Meeting creationists on their own terms: understanding the Genesis flood

Paul Braterman:

Maimonides said it best, over 800 years ago. The Divine Teaching is, of necessity, expressed in human language. We don’t believe that God has fingers and hands (Exodus, Isaiah, Psalms, Luke) or goes for walks in gardens (Genesis). I would add that no one takes the commandments in the Bible literally, and when Daesh comes close to following the rules of law laid down in Deuteronomy, we are quite properly appalled. All of this is familiar, but this piece combats biblical literalism on its own terms, shows how it is inseparable from interpretation, and thereby undermines its strongest attraction – the illusion of certainty.

Originally posted on The Logic of Science:

In this post, I am going to do something highly atypical for a science blog: I am going to talk about theology. I want to be very clear about why I am doing this and why you should pay attention (regardless of your personal religious beliefs or lack thereof). I have spent a great deal of time talking to creationists, and what I have found is that most of them are concerned primarily with what the Bible says, and they only accept science when it happens to line up with their religious views. In other words, it’s not that the creationists are unintelligent, it’s simply that they have different priorities. As a result, if you initiate a conversation with creationists by talking about the science of evolution, you won’t get anywhere because they think that the science conflicts with their religion, but if you start by explaining why the science

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21st Century Capitalism Subverting Democracy, Says Top Investment Manager

Financial system failing; real problems of climate, environment, resource limitation, and looming food shortages ignored; long-term consequences never considered; rising inequality; a rewards system that stops the market from behaving rationally; democracy ineffective against the influence of the financial elite.

Jeremy Grantham

Photograph by Erik Madigan Heck via WSJ

Who says? Left-wing intellectuals like Naomi Klein, contrarian Nobel Prize economists like Krugman and Stiglitz, political dissidents like Syriza in Greece, Podemos in Spain, or Scottish National Party, Green, and a cetain Labour would-be leader in the UK? No; one Jeremy Grantham, financial strategist whose firm manages more than US $118 billion in assets, in his keynote address to the 2015 Morningside Investment Conference in Chicago. I don’t normally write about financial matters, but here we have the chief strategist of one of the world’s largest asset management firms delivering one of the sharpest critiques of what now passes for capitalism that I have ever seen, and his remarks* deserve far wider circulation.

Grantham lists the following 10 major problems [my comments in brackets]:

Resource constrains, low capital expenditure, inequality itself, climate pressures, and the low-hanging fruit is mostly gone. Facebook is not the steam engine.

Human folly, avoiding unpleasant information, leading to bubble after bubble as we repeat past mistakes, and deny or ignore the really important matters, like climate change.

Resource limitations. Conventional economics pays no attention to this, and assumes endless growth, as if the free market were a perpetual motion machine that would never run out of anything.

In particular, oil. Our economy was built on cheap oil, which is running out now. [Shale gas has reversed this, but only for the moment.]

Climate problems. Tree ring data show that California is the driest it’s been in 1,200 years. The cotton crop in Texas failed for 6 years in a row because of drought, and then came devastating floods.

Food problems. Probably, the biggest problems that we face, with water running out, soil erosion, population growth, and climate change. This may well lead to chaos in the world’s poorest countries. [Food problems were predicted in the 1940s, and failed to materialise, but that was because of the Green Revolution and Haber process fertiliser. There are no comparable innovations in sight.]

Income inequality. The economy can’t grow when wages are failing to rise.

Slow rise in output, for many reasons. What technology can most readily provide, we already have [as in my example regarding food]. As Grantham puts it, “Resource constrains, low capital expenditure, inequality itself, climate pressures, and the low-hanging fruit is mostly gone. Facebook is not the steam engine.”

Systematic failings of modern capitalism, which focuses exclusively on profit, neglects common resources such as air, water, and soil, and discounts the future of our grandchildren. As a Princeton University study shows, the [US] financial elite has massive influence on legislation, while public opinion has little or none; “This is not really effective democracy in action.”

Bad management by the central banks, and a corporate culture where 80% of the rewards of top management are in stock options, making financial manipulation (specifically, share buyback using cheap borrowed money) more rewarding than real investment in new productive capacity.

This is not really effective democracy in action.

Finally, market bubbles. These are built into the structure of the financial industry. Investment managers protect their jobs by following the herd. So everyone does the same thing, pushing markets away from correct valuations, and making the rational distribution of resources, which is after all the whole point of free market capitalism, impossible.

The rest of Grantham’s presentation was highly technical, directed at his fellow investment managers; that part of his talk is summarised here, as reported by an investors’ website, which did not, however, bother to relay his remarks on the wider issues discussed above.

*Behind a pay and membership wall, but this summary is my own personal review and may be freely copied with acknowledgement.

Linguistic Creationism and the Tower of Babel

Paul Braterman:

The Tower of Babel by Pieter Bruegel the Elder (1563), via Wikipedia

This from Uncyclopedia by way of my friend John Zande’s Superstitious Naked Ape.  To the arguments used there, I would add the following:

Linguistic evolutionists cannot explain the origins of language. Therefore the theory of language evolution fails its very first test

If English is derived from German, why are there still Germans?

No one has ever observed one language change into another. Were you there?

The real reason why people deny that the different languages were created by God, is so that they can use bad language. After all, if language is not God-given, there are no objective standards and anything goes.

And when I first came across the arguments below, I thought that no one could really be using them to defend the Tower of Babel story. I was wrong. See e.g. Creation and Human Language (Creation Social Science Quarterly) and The Origin of Language (Creation Magazine); h/t John Zande. Links to creationist sites are nofollow.

Originally posted on the superstitious naked ape:

The following is taken directly fromUncyclopedia.

fingerprint-dm Linguistic Creationism is a theory stating that all of the natural languages could not have developed naturally, so they must have been intelligently designed by God when he destroyed the Tower of Babel.

ARGUMENTS FOR LINGUISTIC CREATIONISM

Irreducible Complexity: If you remove letters from the word “book” you get “ook”, “bok” and “boo”, all of which are nonsensical and hence not sustainable by usage for subsequent evolution into meaningful words. It is thus impossible that the word “book” developed from any other word, it must have been created by God so in order to be used.

Improbability of spontaneous linguistic genesis: It is highly improbable that even the simplest English sentences were formed from alphabet letters spontaneously, since the odds of monkeys banging away on hypothetical typewriters and in so doing generating a readable and semantically meaningful text is vanishingly small. Hence the English language…

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Exposing the Roots of Young Earth Creationism

Paul Braterman:

Long but worth it. See in particular the section “Advice from a Former Young Earth Creationist”. This post exposes Young Earth Creationism as a 20th-century heresy, with sinful disregard for reality. It also considers from the inside (as I cannot) the claims Creationists make based on Christian faith, and dismantles them. Compare my own posts Biblical literalism as blasphemy and Anti-Creationists need to think about tactics, extensive writings by my friend the geologist historian priest Michael Roberts, at Peddling and Scaling  and elsewhere, and Numbers’ detailed scholarly analysis  The Creationists.

For my own blog, I’ve settled on Primate’s Progress as title; a clear favourite. Many thanks to those who shared your thoughts on the matter, here and elsewhere. H/t John Bunyan, of course, but I shall do my best to avoid the Slough of Despond.

Originally posted on Letters to Creationists:

SUMMARY

The Protestant consensus since the time of the Reformation has been that the physical universe and its history are real, not illusory. As God’s creation, the physical world conveys genuine information about the Creator and can serve to inform our interpretations of the Bible. Therefore, when geologists (many of them devout Christians) in the early 1800’s found that the rock layers showed the earth to be far older than the 6000 years derived from a literal reading of Genesis, Bible-believing Christians did not ignore, suppress, or lie about these findings. Rather, they adjusted their interpretation of the relevant Bible passages away from a simplistic literal reading, just as they had done 200 years earlier with the verses that depicted a stationary earth. Through about 1960, nearly all Christians, including conservative Old Testament scholars and most fundamentalists, were comfortable with interpretations of Genesis which accommodated an earth that was many…

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‘Stone Age’ tools are a problem for YEC; but Noah’s Flood solves everything

Paul Braterman:

(Reblog of Terry Mortenson concedes: ‘Stone Age’ tools are a problem for YEC, Age of Rocks) Lava flows across Antrim? Blame Noah’s Flood. Palaeosols in between them? Noah’s Flood again. Moving continents? Obviously the result of Noah’s Flood. All those poor extinct dinosaurs (the ones that weren’t later exterminated by Nimrod the Mighty Hunter) – drowned in Noah’s Flood. And radiometric dates proving, by any sane standard, an ancient Earth? You guessed it; they don’t take account of the radiation associated with Noah’s Flood.

And now, with breathtaking disdain for reality, a Creationist explanation for the Palaeolithic toolmaker’s rubble that covers so much of Africa (but nowhere else). All produced by colliding rocks, during Noah’s Flood.

Wait a bit and we’ll be told that cratering on the Moon, Mars, and Mercury is somehow caused by Noah’s Flood. Come to think of it, we don’t even need to wait. There’s one school of Creationist thought, if you’ll forgive the oxymoron, the one behind Noah’s Ark Zoo Farm near Bristol, that says exactly that.

Originally posted on Age of Rocks:

Answers in Genesis generally does well not to acknowledge its best critics, because doing so exposes their audience to the fact that theirs is a ministry rooted in pseudoscience, which is ultimately damaging to the cause of Christ. If we abhor the truth as it pertains to the natural world, how are we to persuade anyone that we hold the keys to God’s kingdom?

When AiG does respond, typically it is prefaced with caveats highlighting the ‘naturalistic’, ‘atheistic’, or ‘evolutionary’ assumptions that motivate their attackers. This strategy is effective in dismissing those like Richard Dawkins, who are not shy about such convictions, or Bill Nye, who—though less antagonistic—is still not a confessing Christian. However, as Terry Mortenson demonstrated yesterday, AiG cannot entirely ignore pleas from within the church, despite that it simultaneously informs their readers that most Christians—especially those holding advanced degrees in theology or the natural sciences—also describe creationist’s efforts as bad…

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What’s in a name? The Pensive Primate, or Primate’s Progress? Tell me what you think

Orangutans are capable of having mental maps and calendars of the forest

Orangutans are capable of having mental maps of the forest

Update: Primate’s Progress it is.

And now for something a great deal less serious.

I originally planned to concentrate on scientific topics, especially the quirks of evolution, so I called this blog “Eat Your Brains Out”. I was referring in particular to the sea squirt. A sea squirt is a tunicate, a member of the group most closely related to vertebrates (that’s you and me and frogs and fishes), but you wouldn’t think so to look at it. As I wrote the story, it starts out as a free-swimming larva, clearly related to our tadpole ancestors, but when it grows up it just sticks its head on a rock and turns into a couple of slimy tubes and reabsorbs its juvenile nervous system because it doesn’t need it any more. Nice story but, as a well-informed reader pointed out, it’s more a matter of rearranging than reabsorbing. Besides, I suspect that more people know about Zombie Apocalypse than about the metamorphosis of sea squirts. And in any case, I’ve found myself writing about all kinds of things, such as politics, education, and freedom of speech, not just about science. Time for a new title.

So, after watching the final episode of BBC’s Monkey Planet (“how primates are individuals with a sense of self and why brainpower is essential to primate survival”), I decided to assert my sense of self and advertise my brainpower by renaming my blog The Pensive Primate. But then I discovered a company selling what it calls Pensive Primate gifts, such as mugs and T-shirts with pictures of orangutans on them, so I settled for Primate’s Progress instead. However, I have mixed feelings about the word “progress”. It makes me sound little bit like (perhaps I am a little bit like) a naive optimist left over from an earlier century. More seriously, it suggests a common misconception about evolution, which is that it is somehow always Onwards and Upwards.

Further searching showed that the label “Pensive Primate” has actually been used many times by photographers and artists, and as far as I can see it is not a trademark. It follows that I can use it too if I want to. After all, there’s no real risk that this blog will be mistaken for a multi-million marketing enterprise.

So now I have to decide. Which is it going to be, The Pensive Primate or Primate’s Progress?

Comments welcome

Image: BBC web site

Will this spread? 349 students at Scottish High School challenge Christianity’s monopoly

North Berwick High SchoolMore than a third of the students at North Berwick High have signed a petition challenging Christianity’s monopoly in Religious Observance and School Assemblies. In order to express their views more freely, they have set up their own newspaper, The Contender, of which the first two numbers are available on line here and here, and obtained a grant to pay for a print edition. These actions have attracted well-deserved media attention both locally and UK-wide, and are likely to be discussed by the Scottish Youth Parliament.

Here is what they’ve signed:

 Petition for the Secularisation or Religious Diversity of School Assemblies and/or Functions

By signing this petition you, as a North Berwick student, are agreeing that there should either be no religious influence (in assemblies, other events) in school or that all religious denominations should be represented, and that it is inappropriate for only one religion (Christianity) to be advocated, in particular the assemblies led by members of the Christian church.

Setting up a newspaper of the quality achieved at North Berwick is a major enterprise, but these days any group of students can publish articles expressing its views using WordPress or Blogger, and spread word of them through social media. Moreover, any group of students in any school can organise a petition like this one, and, as we shall see, would be right to do so.

It is inappropriate for only one religion (Christianity) to be advocated, in particular the assemblies led by members of the Christian church.

(North Berwick student petition)

Strange as it may seem, all the students are demanding is that the school act according to the policies stated in its own handbook, which are based on the Scottish Government’s current guidance letter. Both the handbook and the guidance letter say, in identical language, that “[M]any school communities contain pupils and staff from faiths other than Christianity or with no faith commitment, and this must be taken fully into account in supporting spiritual development. It is of central importance that all pupils and staff can participate with integrity in forms of religious observance without compromise to their personal faith” and that “There should be a clear distinction between assemblies devised for the purpose of religious observance and assemblies for other purposes such as celebrating success.”

There should be a clear distinction between assemblies devised for the purpose of religious observance and assemblies for other purposes such as celebrating success.

(School handbook; also official Scottish Government guidance)

The Church of Scotland has also expressed remarkably similar views. In a 2013 submission to the Public Petitions Committee, objecting to the Scottish Secular Society’s plea to change Religious Observance from opt-out to opt-in, it stated that “What is defined now as Religious Observance in Schools is a pluralist approach in a pluralist society”, that Religious Observance events are “a place to encounter different beliefs and points of view, which are fundamental in making sense of the pluralist society in which we live”, and that “Religious Observance is not, and should never be confessional in nature (it is not worship nor can it be).”

What is defined now as Religious Observance in Schools is a pluralist approach in a pluralist society.

(Church of Scotland, to Scottish Parliament)

I also found in the Handbook a list of the members of the school chaplaincy team, at least as it was at the time of the last posted handbook edition, which would seem to be 2012. And while official bodies will not tell you the affiliations of school chaplains, regarding this as confidential personal information, a web search quickly showed that all were committed Protestant Christians, ranging from Episcopalian to extreme Evangelical [1]. The Evangelicals meet on the school premises for Sunday morning worship, but there seems no reason to object to that so long as the school handles all requests for accommodation evenhandedly, and does not pressure students into attending.

North Berwick West Bay (Kim Traynor via Wikipedia)

Can such a team deliver the promised “pluralist approach in a pluralist society”? Not according to the latest (2011) census data. These show all non-Catholic Christians totalling 38% of the population, as against 44% for “no religion” or “no religion stated”. Even these numbers will underestimate dissent from religion, especially among the school’s students. The religious affiliations monitored by the Census do not necessarily imply religious practice or belief, and we also know that religiosity is greater among older Scots than among the young.

Two things follow. The students are merely asking that the school follow its own stated policies. And spiritual education, if indeed such a thing is possible, can no longer be left to churches in which so many of the students no longer believe.

The students’ representatives are also asking the School Administration to allow 16-year-old students to withdraw themselves directly from Religious Observance, without involving their parents. I find it strange that they even need to ask. We are talking about young people who are by law old enough to get married, or to vote in at least some crucial elections. The individuals we are discussing have also shown themselves capable of effective organisation, and of producing work clearly superior to their own local newspaper. And while the law may regard the decision to withdraw as one for the parents, the school has no legal right to enforce attendance on 16-year-olds anyway, so why should it even try to retain this right when it comes to one particular activity?

1] The Chaplaincy Team members, and their affiliations as revealed by an on-line search, are Rev Neil Dougall (St Andrew Blackadder Church of Scotland), Bill Nisbet (North Berwick Christian Fellowship) , Shiona Liddle (North Berwick Christian Youth Trust, Inspire), Rev Dr David Graham (Abbey Church of Scotland) and Rev John Lindsay (St Baldred’s Episcopalian). In addition, the local paper reporter covering the school is the Minister of Belhaven Parish Church, Rev Laurence Twaddle.

Inspire is a CofS/Fellowship joint venture, which gives out free rolls at its lunch club and is involved in the school play.

The Fellowship gives no details of its beliefs on its web page, but is affiliated to Scottish Network Churches, some at least of whose members believe in Noah’s Ark as a fact of history and the eternal punishment of unbelievers in the Lake of Fire.

Why the Sea Squirt Eats its Brains Out (Sort of)

Good to eat, in traditional Mediterranean and oriental cuisines. Good food for farmed fish, not that they (the fish, I mean) really have much choice in the matter. Good as a source of possible biofuels. And now good for almost £1,000,000 of research funding. Your sister, the sea squirt, actual species Ciona intestinalis, coming shortly to a fjord near you.

The sea squirt is the ultimate in middle-aged complacency. It starts off looking a little bit like a tadpole, with a brain (of sorts, “cerebral vesicle” in diagram), a tail with a nerve cord and a stiffening rod (the notochord), an eye (ocellus), and a balance organ (statocyst). The reason it looks like a tadpole at this stage is because it is like a tadpole. The notochord is related to the backbone in vertebrates, a spinal cord runs parallel to it along the flexible tail, and at the head end of the spinal cord there primitive brain coordinates sensory inputs.

Anatomy of larval tunicate (John Houseman via Wikimedia)

But when it matures, it sticks its head on a rock, and changes into its adult form, which is not much more than a mouth (branchial siphon), a stomach, and an exit tube (atrial siphon). It is a hermaphrodite, with one testis and one ovary. Both of these ejaculate into the exit tube, and there are rather complicated mechanisms to prevent self-fertilisation. It protects itself by growing an outer coat, or tunic, made of cellulose-like material, hence the scientific name name tunicate. The sea squirt eats, or to more exact reabsorbs, notochord, tail, sense organs and nervous system, since these are no longer needed, while it feeds by wafting water into its mouth cavity, and filtering out suspended particles. Hence the meme (whose evolution deserves a blog post to itself) that speaks of the sea squirt eating its brains out, comparing the process to a Professor gaining tenure (disclosure: I am myself a former tenured Professor).

Actually, it’s a bit more complicated (see Supplementary Reading, especially the 2005  article), which gives me a good excuse to drop the “Eat Your Brains Out” from the title of this blog, and replace it with the more readily understood “Primate’s Progress”.

Generalised anatomy of adult tunicate (loc. cit.) Note what isn’t there any more; original brain, nerve, moveable tail, and sense organs

Tunicates are the sister group to vertebrates, meaning that tunicates and vertebrates are more closely related to each other than to any other group. They may not look like it, and for many years it was thought that the closest group to the vertebrates were lancelets, animals with simple fish-like bodies that burrow into sand. However, one clue to the contrary was the fact that most vertebrates, and tunicates during their adventurous youth, have a sense of smell while lancelets don’t. (Whales don’t have a sense of smell either, not having any use for it. However, their DNA still contains a degraded version of the genes that in other mammals code for sense organs, inherited as we would expect if their terrestrial ancestors.)

The matter was not settled until 2006, when molecular phylogeny (basically the same kind of DNA testing used every day in the courts to establish paternity) showed that vertebrates like you and I, and tunicates like sea squirts, are more closely related, and are what biologists call sister groups, while the lancelets are merely cousins (for a detailed technical discussion, see here). The partings of the ways took place some 550 million years ago, and a lot has happened since to obscure matters. Tunicates now have the simplest genome, but this is the result of gene loss. That of vertebrates shows the effect of doubling and redoubling, one of the many ways in which evolution can give rise to new information.  However, evolution is not necessarily progress, nor are we more highly evolved than tunicates. We just happen to have evolved in what are, for us, more interesting directions.

So appearances can be deceptive. In fact, tunicates have quite a bewildering variety of life histories and reproductive strategies, including (for salps, which are close relatives of sea squirts) cloning, group sex, and a midlife sex change. Molecular comparisons between those tunicates that never settle down, and those that do, suggest that the sedentary habit has been discovered more than once, and that tunicates can evolve new body forms with unusual rapidity.

Seasquirt3

Tunicates raised at a research facility in Øygarden, Norway. (Photo: Bård Amundsen, from Norwegian Government press release)

The Norwegian government has just spent 8.7 million Norwegian krone on these creatures. Why, and what exactly do they hope to gain from it? The idea is to anchor huge sheets of plastic in selected Norwegian fjords, with buoys attached to the top to keep them vertical, and allow the chosen species of sea squirt to colonise them. The fjords are ideal in shape for this, being steep-sided drowned valleys, carved out by ice age glaciers. The sea squirts will require no feeding, because they get enough nutrition from suspended fragments of debris. They will not exhaust this food supply, as the water is replenished twice daily by the tides. Thanks to their cellulose-like tunics, they attract no predators, so harvesting them will not deprive any other species of its normal food, and as an overall accumulator of protein the project is predicted to be 100 times as efficient per unit area as grazing land animals. So you can harvest the sea squirts, grind them up, and use them as fish feed. This is potentially very big business, because Norway is the world’s leading producer of farmed salmon, which until now have needed to be fed, themselves, on fish. The sea squirts are even efficient accumulators of omega-3 fatty acids, produced by microorganisms, which end up in the salmon.

There is more. At the moment, biofuels are of two kinds; those derived from starch, and those from vegetable oils. Both of these compete directly with food. There is very serious doubt as to whether corn alcohol, so beloved of farmers in the American Midwest, actually contributes anything to reduction of global warming, after taking into account the energy spent growing and fertilizing the grain, and the fact that more food will need to be grown elsewhere. My own view is that biofuels will never make a real contribution to the world’s energy supply until we develop a good technology for making alcohol from cellulose. This is more difficult than making it from starch. Both starch and cellulose are polymers derived from glucose, the only difference being the way in which glucose units are joined up, and how to unravel cellulose and convert it into biofuel is a hot research topic. But, as the group funded by the Norwegian Research Council points out, cellulose from wood is blended with a tough polymer called lignin, which is even more indigestible. I would add that other plant sources of cellulose are also complex mixtures, and that in any case, land used to grow biofuel crops becomes unavailable for agriculture, or for natural carbon-fixing processes such as peat formation. So if cellulose biofuels do turn out to have a future, a marine source has many advantages.

Current developments are, I suspect, under wraps for commercial reasons, but the research group involved have already taken out patents on the production of biofuels from tunicates, and the use of tunicate material as feed for (non-human) animals.

Two questions remain unanswered. Can a good way be found, on a bulk scale, to remove the water which makes up 95% of the body mass of the sea squirts? And a further question of my own; what will the farmed salmon taste like?

An earlier version of this post appeared on 3 Quarks Daily. I thank Zen Faulks of UT Pan-American for critical discussion of the “Eat your brains out” concept.

Further reading:

The larval ascidian nervous system: the chordate brain from its small beginnings, A. Meinertzhagen and Y. Okamura, Trends in Neurosciences 24(7). 401-410(2001).

The nervous system in adult tunicates: current research directions, O. Mackie and P. Burighel, Canadian Journal of Zoology 83(1): 151-183, 2005

Deuterostome phylogeny, Sarah J. Bourlat et al., Nature, 444, 2006, 85 (2006).

A chordate with a difference, Linda Z. Holland, Nature, 447, 2007, 153 (2007).

The amphioxus genome, Nicholas H. Putnam and 35 other authors from 18 different institutes, Nature, 453,1064 (2008) (free download); Amphioxus unleashed, Henry Gee, Nature, 453, 999 (2008) [amphioxus, meaning “sharp at both ends”, is a term for lancelet]

A review of the life cycles and life-history adaptations of pelagic tunicates to environmental conditions, Don Diebel and Ben Lowen, ICES Journal of Marine Science, 2012, 358; free download.

 

To my Brazilian readers

Welcome. Who are you? How did you find me?

In the past couple of days, 10% of my page hits have come from Brazil. I’m delighted. Brazil is a battleground between the acceptors of scientific reality (who can claim some support from the Catholic Church) and invading Evangelicals and Seventh Day Adventists. These last are extreme creationists, not merely science-denying but science-distorting. They maintain that the entire geological record is due to Noah’s flood, that their own position differs from the scientific mainstream only in its choice of interpretation, and that mutations can only degrade and not create information. Students of creationism will recognise here all the worst features of Henry Morris’s Flood Geology, Ken Ham’s Answers in Genesis, and the intellectual distortions of the Intelligent Designers. So if this blog is service anywhere, it will be of service in Brazil.

It is clear why I want to be found by Brazilians, but why should Brazilians want to find me? I did have a public exchange with a creationist on the Brazilian Airforce Academy cultural website, Letras & e-Artes, and am told that my contribution was well received, but that was 18 months ago. I also, more recently, had a tedious Facebook debate with a self-styled Adventist theologian, who presented as if new coined arguments rebutted in the 1920s, but I doubt that her followers would be beating a path to my door.

And yet, I must be doing something that is of special value to readers in Brazil. What is it, and how do I set about doing the same elsewhere?

Why only Brazil?

 

100 Reasons the Earth is Old (reblogged from Age Of Rocks)

I am posting this page from Jonathan Baker’s Age of Rocks here for several reasons. It is an extremely useful resource, well researched and well-written; the author addresses creationists with humanity and respect, even as he demolishes their position; and the author himself is a committed Christian (why that should matter to me, a free-thinking atheist, is something I explain below).

Edinburgh to Siccar Point June-Jly 2012 048

Siccar Point. Horizontal Devonian sandstone over uptilted Silurian greywacke. Click and re-click to enlarge

The evidence presented ranges from tree rings to topography to sedimentology to physical geography to archaeology and anthropology to geochemistry to the fossil record to radiometric dating to astrophysics. Many of these are topics I have touched on, for example in my discussions of the unconformity at Siccar Point, and the slowly cooled multiple lava flows and palaeosols of the Giants’ Causeway.

In each case, the reasoning is briefly described, with links to more detailed discussions, many framed specifically to refute creationist claims. By relegating those claims to second place, the author avoids the common mistake of teaching the very error that he is warning against. At the same time, he pays a respectful attention to his opponents, for reasons that he explains elsewhere in his blog, even as he dismantles their arguments.

Like the authors of EvoAnth  and Leaving Fundamentalism, the author is at present a graduate student; welcome examples of how the web is democratising discourse, and how young scientists and educators are using the opportunity.

I commend this piece to all those who have to deal with creationism in schools and elsewhere, alongside such classics as 29+ Evidences for Macroevolution and Index to Creationist Claims, and hope that the author will continue to update and add to it as his own career progresses.

P1000089

Giants’ Causeway: interbasaltic laterite palaeosol between lava flows at The Chimneys. Click and reclick to enlarge

Like Dennis Venema at Biologos and Robert Wiens at Radiometric Dating – A Christian Perspective, the author is a committed Christian, thus helping to give the lie to the claim that Christian belief requires biblical literalism and the rejection of established science. This matters, since as I have argued before inviting creationists to abandon their deepest convictions is not likely to be the best way to change their minds. Research at Glasgow  agrees with me on this. Life science entry classes there contain a sprinkling of creationists, most of whom abandon their creationism during the course, but without necessarily renouncing their religion. I should for completeness state my own view on religion, which is that believers face major problems in accepting reality. But they are their problems, not mine, and it is not my place to tell them how to deal with them.

I have one small technical quibble. Paragraphs 73 and 74 seem, for reasons of brevity, to run together separate things under the heading “argon-argon dating”. These are: Ar-36/Ar-40 comparisons, used to subtract out the contribution of any argon initially present; Ar-39/Ar-40 that uses Ar-39, produced from K-39 by irradiating the sample, as a proxy for K-39 and hence for K-40 (this is what is usually meant by “argon-argon dating”); and finally, Ar-39/Ar-40 combined with controlled heating to distinguish endogenous Ar-40 (which will be released at the same temperature as the Ar-39) from so-called “parentless” Ar-40 that has diffused in from other rocks, which will be released more readily.

But I digress, and it is time to let Jon speak for himself:

100 Reasons the Earth is Old

How do we know the Earth is older than literalistic readings of the Bible seem to imply?

Nicolas Steno, pioneer in sedimentology and stratigraphy

Nicolas Steno (1638–1686), the Catholic bishop who formulated foundational principles in stratigraphy, paleontology, and even crystallography.

Geologists have been wrestling with this question for centuries, especially those pioneers in the Earth sciences (e.g. Nicolas Steno, William Buckland, Hugh Miller, Thomas Chalmers, and even Charles Darwin) who were also devout clergymen or at least trained in natural theology. The 19th century in particular may be characterized by the massive, interdisciplinary effort that sought to answer the question scientifically: how old is the Earth? But it was not until the mid 20th century that all efforts began to converge on the value we accept today: 4.56 billion years.

Today, a resurgence of young-Earth creationism has many persuaded that science, when applied faithfully, still supports a much smaller age—close to only 6,000 years. While the arguments behind this movement are not convincing to professional geologists, as I’ve sought to elucidate on this blog, their popularity highlights the need to summarize coherently the positive evidences in favor of ‘deep time’. Below, I have compiled what I deem the 100 most convincing reasons—in no particular order—that the Earth is not less than 10,000 years old.

Those readers from a young-Earth background might be quick to point out that many of the evidences listed below have been refuted by creation ministries in their article databases. But that’s no coincidence. Those article databases are primarily built to rationalize to what are indeed strong evidences against the young-Earth position. So please note, I am keenly aware of those counter-arguments, and therefore I encourage you either to follow the links to in-depth discussions of each evidence or to contact me directly about why I find such counter-arguments unsatisfactory.

How do we know from geology that the Earth is greater than 10,000 years old?

  1. Tree-ring “long counts” from California, Central Europe, New Zealand, and Scandinavia extend up to ~13,000 years. These chronologies are constructed from hundreds of individual trees that overlap, so that even if a tree did produce multiple rings during a growth season, the ‘extra years’ would disappear in the correlation process. Even John Woodmorappe has written that these tree-ring chronologies cannot be explained by multiple rings being produced in a single year or the mismatch of individual tree records.
  2. treering

    Annual bands in the cross section of a temperate tree (original image here).

    The oldest individual bristlecone pine trees date to ~5,000 years old by dendrochronology (ring counting), which is older than the traditional date for Noah’s flood. Since we have no reason to suspect that these trees could have formed multiple rings in any given year, these trees provide two constraints: 1) the flood, if it were global, occurred more than 5,064 years ago, and 2) the Earth’s surface, where the trees were growing, has been identical to modern day over the last 5,000 years. The latter point is important, because flood geologists must assume that catastrophic geological processes continued for centuries after the flood to explain Quaternary deposits and erosional features like Grand Canyon or the Channeled Scablands.

  3. Long-term records of glacial ice can be dated by counting annual layers beyond 10,000 years. These annual layers can be recognized not only by appearance, but variations in chemistry, which removes any assumptions about growth rate during these intervals and precludes the possibility that multiple rings formed each year.
  4. Varved sediments with more than 10,000 layers, such as Lake Sugietsu, Lake Van, and the Cariaco Basin, to name a few. Geologists don’t just assume that these layers are annual, but must demonstrate rigorously that each layer exhibits some kind of seasonal signal (characteristic isotopes, organic matter, or mineral content).
  5. From Figure 4 in Reimer et al. (2013): example of radiocarbon calibration, plotting the radiocarbon age of samples against their known age (between 34–45 ka).

    From Figure 4 in Reimer et al. (2013): example of radiocarbon calibration, plotting the radiocarbon age of samples against their known age (between 34–45 ka).

    Radiocarbon calibration curves confirm that annual layers in trees and varved sediments are indeed annual. The radiocarbon age of annual layers within these deposits are always within ~10% of the age predicted by layer counting, back to nearly 50,000 years. If these layers accumulated catastrophically, or if the radiocarbon method were fundamentally flawed, we should not expect such a match. Additionally, since YEC’s suppose that radiocarbon ages are only apparently old (due to low 14C concentrations during and after the Flood), every marine, tree-ring, and varved lake chronology must be compressed down to ~4,000 years. In other words, the YEC paradigm would predict that trees, glaciers, corals, and seasonally active lakes regularly form 4-10 ‘annual’ bands every year. But they don’t.

  6. There is no radiocarbon in old samples, despite claims to the contrary. Geologically old samples of coal, diamonds, and graphite, for example, yield finite radiocarbon ages that are consistent with the expected level of contamination invariably introduced during sample collection and preparation.
  7. Continuous coral chronologies from modern communities (i.e. not buried in sediments) extend throughout the Holocene. Corals contain annual bands and may be combined like tree rings to construct long-term chronologies, or dated by the radiocarbon and/or U-Th method. Applying these tools, geologists use corals to reconstruct sea level over the last few tens of thousands of years (or more!).
  8. stalagmiteTauriusCave

    Cross section of a stalagmite prepared for stable-isotope analysis. Drill pits are from powders collected for U-Th dating. Image from UT-Austin media release.

    Secondary cave formations, such as stalagmites, can form relatively quickly (1–2 mm/yr) in tropical climates or where summer monsoons bring large volumes of precipitation to the cave system. For caves found in temperate or arid climates, however, the growth rate of stalagmites can be incredibly slow (<0.1 mm/yr). Advanced techniques in U-Th disequilibrium dating confirm what geologists long suspected: these iconic formations took tens of thousands of years to reach heights of half a meter or more.

  9. Large subterranean caverns do not form overnight, especially outside of tropical climates. The dissolution of caves is a rather slow process, due to the limited solubility of calcite in very slightly acidic rainwater. Although the process can be accelerated in the presence of active soils or even hydrogen sulfide (a microbial byproduct of petroleum degradation), the sheer size of natural monuments like Mammoth Cave and Carlsbad Caverns cannot be explained in a young-Earth timeline, especially given that these caves are lavishly decorated by secondary formations, which themselves take thousands of years to form.
  10. Large terrestrial lakes and inland seas have accumulated more than 10,000 years worth of deposition. Examples include the Black Sea, Dead Sea, Caspian Sea, Lake Baikal, Great Salt Lake, Lake Van, Lake Ammersee, Lake Sugietsu, and Lake El’gygytgyn, to name a few. These lakes are dated by combinations of radiocarbon, annual band counts, and isotopic records that correspond to climatic trends from ice cores. Some contain evaporite layers, indicating that the lakes dried up in the past. In the cases of Dead Sea and Great Salt Lake, this happened many times in the past on glacial-interglacial scales.
  11. Lake Baikal in Siberia has collected sediments that are inconsistent with any catastrophic inflow from the surrounding region. The sediments at the lake bottom are rather fine-grained, free of terrestrial plant debris (aside from microscopic pollen near the shoreline), and contain abundant diatoms. These diatoms flourish in the summer months but settle very slowly to the lake bottom, so their presence throughout the sediment column confirms that sediments accumulated under normal conditions, similar to today. Therefore, we can confidently say that the lake basin is potentially millions of years old, given the sheer thickness of lake-bottom sediments.
  12. Well developed river flood plains span large areas of temperate and tropical regions of Earth. These flood plains develop over long intervals of time as periodic flooding and migration of the river channel slowly erode the bedrock down to a flat surface. Attempts to describe vast planation surfaces by the retreat of flood waters do not work, because during floods, erosion is localized in channels that form along ‘weak points’ in the underlying rock and sediment. If this erosion took place soon after the Flood, the sediment would still be soft, exacerbating the localization of erosion in deep channels.
  13. Slithering stone in Death Valley. Photo by Momatiuk - Eastcott/Corbis photography.

    Slithering stone in Death Valley. Photo by Momatiuk – Eastcott/Corbis photography.

    Painfully slow erosional processes in modern deserts, involving wind, ground tremors, or even ice, are the best explanation for some rather bizarre boulders scattered across the dunes. Slow tumbling boulders in South American deserts, for example, had to be weathered slowly by wind in the arid highlands, and cosmogenic dating confirms their old age. Slithering stones of Death Valley, on the other hand, were proven to move only by seasonal ice. These findings imply that the modern landscape has changed little in thousands of years (if not millions!).

  14. Evidence for numerous glacial cycles during the Quaternary (i.e. the past 2.6 million years) is particularly abundant in the northern hemispheric continents of North America and Eurasia. These evidences include glacial tills and terminal moraines, which are buried within layers of Quaternary aged sediments. Between these glacially derived layers, relatively warm-weather plants populate the sediments of old river valleys, indicating that climate rebounded after each ice age to one similar to what we find today.
  15. Quaternary deposits and landscapes are far too complicated to have accumulated in the ~4,500 years following the Flood. Everywhere we look on Earth, we truly find evidence for ~2 million years worth of processes, whether at high latitudes (where we find evidence for repeated glaciations and deglaciations, separated by warm intervals) or in the tropics (where we find thick desert dune sequences alternating with humid intervals) or in the oceans (where 2 million+ years of Milankovitch cycles are recorded in only a few meters of silt and clay) or in the high mountains (where alpine valleys have been carved out by rivers or glaciers, then infilled by coarse sediment, then eroded again, etc.). Flood geologists unanimously assert that the Quaternary period represents the ‘post-Flood’ era, but there is good reason that conventional geologists ascribe a much longer age: 2.6 million years.
  16. Glacial tills from ancient glaciations, such as the ‘Snowball Earth’ episodes in the Late Proterozoic
    Dropstones in a glacial diamictite from Death Valley, California.

    Dropstones in a glacial diamictite from Death Valley, California. Image credit.

    and cold intervals beginning the Late Ordovician and Late Pennsylvanian periods, are found within the geological record and so must be reinterpreted by Flood geologists as submarine deposits of boulders and mud during Noah’s flood. Though ancient tills do occasionally resemble submarine flows, ancient glaciations are not inferred by these sedimentary deposits alone. Instead, a suite of geological data, from fossils to paleoceanographic data to rock chemistry, all support the idea that the whole Earth was much cooler when these tills were deposited.

  17. Continental ice sheets do not form in a matter of centuries, especially those that were more than a mile thick and extended in some cases to southern Siberia and the central Great Plains, USA. Flood geologists must maintain, however, that massive ice sheets nearly half the size of Russia not only grew, but melted entirely, then regrew, melted entirely, and regrew more than a dozen times in less than 200-700 years (the timeline depends on which YEC you ask!).
  18. Human occupations of nearly every continent can be demonstrated beyond 10,000 years, e.g. in South Africa, ruling out the possibility that humans repopulated the Earth after being obliterated only ~4,500 years ago.
  19. Ötzi the Iceman has frequently made headlines in creationist writings, because they accurately perceive this unique find as a challenge to the young-Earth timeline. The remains of this murdered Alpine farmer date to ~5,300 years old, which YEC’s arbitrarily dismiss as “inflated”. Regardless, they do admit that he lived sometime in the beginnings of human civilization (i.e. very soon after the Flood), and so they attempt to turn the argument on ‘evolutionists’ by emphasizing the level of technology (tools, agriculture) carried by Ötzi and his village—”How can this ‘primitive’ man be so advanced?” This response is a non sequitur, because the artifacts found with Ötzi are entirely compatible with reconstructed histories of European peoples. What YEC’s overlook is the geological context of the body: it was preserved in undisturbed ice near the top of a mountain range. This tells us that the morphology of the Alps has changed very littlesinceÖtzi was alive. So when did theAlpshave a chance to shed the kilometers of sediment that once covered their peaks? ThemountainsinwhichÖtzi wasfoundare indeed very ancient, far older than the body of this 5,300-year-old village outcast.

    Ötzi the Iceman, trapped in ice ~5,300 years before present and nearly perfectly preserved (stomach contents and all!).

  20. Human settlements that are now submerged due to sea-level rise have been documented beneath the English Channel, North and Baltic seas, off the coast of Israel, Florida, and beneath the Black Sea, to name a few. For much of human history, global sea level was up to ~130 meters lower than today, exposing far more of the continental shelves and pushing ancient coastlines far away from their modern locations. This allowed for human settlements to develop in sites that are now completely submerged. Following the ice age, however, sea level rose sharply and reached near modern levels at ~8,000 years ago. Whatever the absolute timeline, the young-Earth view allows too little time for human populations to develop, migrate across the globe, and construct large settlements prior to the sea-level rise following the ice age (which they assert happened only a few centuries after Noah’s flood).
  21. Fossils record long histories of migration of animals from Eurasia to the “New World”, which cannot be accounted for in the young-Earth timeline. Large mammals such as mammoth, mastodon, and giant sloth reproduce far too slowly to account for the population sizes indicated by fossil graveyards between Siberia and the Americas.
  22. There is no record of migration from Central Asia to Australia for many species unique to the land down under. Their ancestors, however, are found in the fossil record and imply that modern populations derived from species that arrived to the island well in the distant past, not after the Flood only ~4,000 years ago.
  23. Modern oceans are too salty to have been formed only ~6,000 years ago. We know this salt was delivered slowly to the oceans mainly via rivers (i.e. as opposed to being created in situ), because the relative abundance of salts in the ocean is related to their relative solubilities and abundance in the Earth’s surface.
  24. Cenozoic aged marine sediments in the Gulf of Mexico or along the west African and east South American coastlines, for example, are far too thick to be explained by ‘post-Flood’ processes. This fact has caused some YEC’s, such as Michael Oard, to push the ‘post-Flood’ boundary later and later into the Cenozoic and consider these marine sediments as Flood deposits. However, the structure of marine sediments in the Gulf of Mexico and the equatorial Atlantic is clearly related to the modern topography, where large rivers like the Mississippi, Amazon, Congo, and Cross have dumped tons of sediment into the seas, causing massive deltas to form over long periods of time. Due to the economic reward for exploring these sites (which contain abundant oil), geologists have thoroughly mapped out the evolution of ancient deltas through miles of sediment. Their result ubiquitously inform us that the modern landscape is very old and rather stable, and that these late Cenozoic marine sediments were not deposited through catastrophic processes, but by everyday rivers at rates observed today.
  25. Deep ocean sediments take far too long to settle to have accumulated in less than 5,000 years. Today, the entire seafloor is covered with microscopic species of plankton, diatoms, radiolaria, etc., in addition to tiny bits of clay and calcite. These particles are so small, that they would remain in suspension under flowing water, so their presence on the seafloor must be explained by a long-time in which they could settle through miles of seawater. The history of seafloor sediments is further amplified by the fact that marine tephra (volcanic ash layers) occur throughout marine cores around the world, but volcanic ash also needs time and calm water to settle out.
  26. santorinideposit

    A 3,500-year-old volcanic ash deposit from Santorini volcano, in three stages: an air fall pumice (bottom), followed by laminated ash that formed underwater (middle tan layer), covered by a pyroclastic flow (top white layer). Photo by Lee Siebert found here with full description.

    Volcanic ash beds (sedimentary tuff), frequently used to date sedimentary rock layers, were mainly deposited in dry conditions. Geologists can distinguish between ash layers that settled in ocean basins (marine tephra) and those that fell over dry land (air fall deposits). When volcanic ash is deposited in flowing water, it produces yet different features identifiable in outcrops, such as grain sorting and lamination. Therefore, not a few volcanic ashes in sedimentary strata contradict the Flood geology scenario, especially because these ash falls take time to accumulate from the air and harden to the point that water-lain sediments can be deposited on top without compromising the structure of the soft ash.

  27. The geologic column is no remnant of an ancient flood deposit, global or not. Fine details, in the form of thin layers of alternating clay and limestone, or irregular sand deposits that resemble modern river channels, defy catastrophic explanation, which explains why catastrophism has long been abandoned by research geologists.
  28. There are simply too many sediments buried in the crust to be explained in a young Earth. Contrary to the claims of Andrew Snelling, the ocean floor contains about as much sediment as we might expect after ~160 million years. In addition to ocean sediments still underwater, however, YEC’s must also explain the origin of the trillions of trillions of tons of limestone, sandstone, and mudstone now buried on the continents. These sediments, comprised of broken down minerals, must have originally weathered from igneous or metamorphic material, after which it was sorted by size through surface processes (like rivers, winds, and gravity). But this is not a rapid process, inviting the question: even if a global flood could have buried this much sediment (it can’t), what is the origin of the sediment in the first place?
  29. The distribution of sedimentary rocks is weighted too heavily over the continents, which is the opposite of what we’d expect in a global flood. Floods move sediments from high elevation to low elevation, depositing them in sedimentary basins. During the Flood, the oceans would have constituted the largest and deepest basins, but most sediments remainedonelevated continents. How did this happen? Did the laws of physics stop working?

    greatunconformity

    The “Great Unconformity” in Grand Canyon. Photo by Marli Miller.

  30. Angular unconformities became one of the principal evidences against catastrophism in the 19th century, and for good reason. For an angular unconformity to develop, a sequence of sedimentary layers must be deposited horizontally, then tilted or folded above horizontal, then eroded along a flat (or nearly flat) surface, after which new layers are deposited horizontally on top of the erosional surface. We can explain all these steps through modern geological processes. Flood geologists, on the other hand, must explain 1) how these horizontal strata became angled amid the flood, 2) had time to erode to relatively flat surfaces, and 3) why we do not find deep canyons associated with unconformity surfaces, since deep, rapid flowing water would tend to carve into the unconsolidated sediment.
  31. This buried landscape, for which little explanation is needed, absolutely defies Flood geology. It is rather a testament to deep time, in which an ancient river valley cut its way though thick sequences of sedimentary rock, only to be buried suddenly and preserved in subtle disconformities between the overlying layers. But these disconformities make for excellent acoustic reflectors, and so the ancient landscape is visible through seismic imaging—a way of treating the Earth to a million-dollar ultrasound.buriedlandscape
  32. Sedimentary features in limestone are similar to those forming today in shallow marine environments. Everything from ooids (tiny spheres that build up like snowballs under wave action) to cross bedding to mudcracks to karst dissolution in ancient limestones falsifies the young-Earth timeline, because these limestone formations were deposited in calm, shallow seas—not a deep, worldwide flood.
  33. Exposure surfaces in limestone are recognizable through features like mudcracks, hardgrounds, and karst dissolution. Karst erosion takes place when relatively acidic waters (like fresh rainfall) dissolve cavities in exposed layers of hardened lime mud. Since karstic surfaces are found throughout the geologic column (including in the Redwall Limestone of Grand Canyon), we can rule out the possibility that limestone layers accumulated under a global flood.
  34. Carbonate rocks (limestone and dolostone) comprise more than 20% of all sedimentary rocks, but Flood geologists cannot explain extensive formations of dolostone—(Mg,Ca)CO3—which forms only under unique conditions not seen today in the oceans. To avoid the problem, they speculate that enhanced delivery of magnesium to the ocean (via deep-ocean vents, or the “fountains of the deep”) would havedriventhe formationofdolostone during the Flood. But in fact, dolomite does not form under these conditions, and so the Flood geology model predicts rather that mostcarbonatesshouldbecomprised of aragonite, the high-magnesium variant of calcite. Every piece of dolomite in the geologic record is firm evidence against the Flood model.

    Areal extent of some major evaporite deposits. Image from Paleobabbler.

  35. Flood geology cannot explain the size and presence of massive evaporite deposits in basins like the Gulf of Mexico or the Mediterranean Sea (a small sampling of the world’s sedimentary salt). Halite (NaCl; same as the salt on your food) is extremely soluble in water, especially at higher temperatures. Therefore, Flood waters would have had to evaporate within individual basins until <10% of the original water mass remained (meaning millions of cubic kilometers were evaporated!). Again, this would imply that the ground was exposed at numerous points during the Flood (contrary to scripture). But it also requires that extreme evaporation could persist over significant intervals of the Flood (during which no water flooded the basins?), which is not physically possible. Evaporation stops when relative humidity in the atmosphere reaches ~100%, but the more water is evaporated, the greater the relative humidity becomes. At 100%, the humidity returns to the ocean as rain. Thus the hydrological cycle would have prevented any large basin from evaporating enough water to deposit halite over its base.
  36. The size and thickness of chalk deposits has frequently been cited as solid evidence against the flood. Young-Earth geologists (esp. Andrew Snelling) have responded by offering pseudo-scientific calculations that supposedly account for the global mass of chalk. These calculations are scientifically meaningless, however, because 1) they assume that coccolithophores (which form chalk in the surface ocean) sustained unreasonably high productivity rates over a significant portion of years leading up to the Flood, 2) that the “fountains of the deep” provided nutrients to the surface ocean (instead of poisoning them, as discussed above), and 3) that all chalk produced prior to and during the Flood could have settled in a coherent deposit at the bottom of the sea (rather than remaining in suspension and mixing with other particles in the surface ocean—a more likely scenario if the Flood was accompanied by strong currents).
  37. Syntectonic deposits are abundant throughout the sedimentary record. As the name implies, syntectonic deposits form simultaneously with tectonic deformation of the local geology. If you’ve ever seen an alluvial fan collecting sediments from the side of a mountain, especially near a large fault, then you can visualize the painfully slow process in action. As the mountainside is exposed little by little, due to adjacent valley dropping in elevation every time an earthquake hits, pebbles and boulders are episodically washed into the valley. Because syntectonic deposits contain eroded pebbles and boulders of underlying sedimentary rocks, their presence in the geologic column makes no sense within a ‘Flood geology’ interpretation. Those underlying sediments must have been solid before they could be broken off and polished into smooth boulders found inmostsyntectonic layers.

    Syntectonic deposits in Echo Canyon Utah. Original photo by Matt Kuchta.

  38. Large extensional basins, such as Death Valley and the Great Basin in the US, contain thousands of meters of coarse sediments that were eroded from the adjacent ranges. These basins only deepen when infrequent, large earthquakes cause the valley to drop 1–2 meters at a time. Even if we allow that earthquakes were more frequent in the past, there is a limit to how fast semi-arid valleys can collect millions of tons of boulders in their center, because major flooding events are required to move these sediments several miles over a shallow slope.
  39. The total offset in large transform faults, such as the San Andreas fault, points to a very long history of slow deformation. Since its inception, the San Andreas fault has separated sedimentary deposits that appear on both sides by 150 miles, but the average slip rate today is only ~5 cm/yr. One could argue that the rate was higher in the past, but there is no direct evidence for this, and large episodic earthquakes can shift the fault blocks locally by only a few meters. On the other hand, there is evidence from the offset of modern gullies and streams that movement has been just as slow in the past.

    Offset of a small creek along the San Andreas fault. Image from Zielke et al. (2012).

    Offset of a small creek along the San Andreas fault. Image from Zielke et al. (2012).

  40. Radiometric dating confirms that modern slip rates of tectonic plates, as estimated by GPS data, remained relatively constant over millions of years. The ability to predict radiometric dates by uniformitarian ‘assumptions’ strongly corroborates plate tectonic theory and removes the assumption of uniformity of process.
  41. The abundance of oil in sedimentary rocks completely contradicts the young-Earth timeline, because oil cannot form within ~5,000 years at temperatures less than ~300°C—far greater than is found in every oil and gas field today. At best, the young-Earth scenario might predict sparse fields of natural gas, being produced by decaying organic matter, but instead we find hundreds of reservoirs containing billions of barrels of oil.
  42. There is too much organic matter in Earth’s crust to have been buried in a single flood event. Flood geologists must contend that most (if not all) of this organic matter—called the biomass—was alive or only recently deadjustprior to the flood. Coal and oil reserves are the most obvious examples of ancient biomass, but nearly every sedimentaryrockcontains a little (up to 1%) by weight. When allsourcesare taken into account, we find that the biomass buried in Earth’s crust is 3,000 times larger than what is found today—far more than could have been present on Earth at any given time.

    Early Cretaceous plant fossil in coal. Photo from Wikipedia commons.

    Early Cretaceous plant fossil in coal. Photo from Wikipedia commons.

  43. Coal beds defy rapid deposition, because the high concentration of organic matter begins with the slow accumulation of plant material in oxygen-poor swamps (and not by rapid burial of floating forests). The occasional preservation of leaves and woody material in coal seams would not be possible if all the buried plant material were fresh to begin with (as with rapid burial of existing forests), but requires that organic remains be at varying stages of decomposition.
  44. Coalification (turning plant matter into high-grade coal) is a slow process, which cannot be compressed to the young-Earth timeline. Experimental attempts to make artificial coal (cited by Snelling here) have only produced very low-grade lignite and coalified wood. Furthermore, these experimental setups (which do require high pressure/temperature and up to several months) rarely reflect natural settings and have yet to produce coal that closely resembles natural samples.
  45. If the majority of the Earth’s sedimentary rocks were deposited within a single flood, then those sediments should all be at approximately the same temperature today, and that temperature should be similar to the average water temperature during the Flood. It would take millions of years for a smooth temperature gradient to form (cool at the surface, hotter nearer the mantle), which is what we find today in deep wells.
  46. Remnants of soft tissue are extreme rarities in sediments older than Quaternary, possibly preserved in a handful of samples around the globe. Paleontologists continue to debate, for example, whether soft tissue in dinosaur bones derived from actual dinosaurs or microbial biofilms. But whatever the answer, we can all be confident that soft tissues are not regularly recoverable from Paleozoic and Mesozoic fossils. If these organisms were buried less than 5,000 years ago, however, soft tissues should be the rule, not the exception. According to the YEC timeline, mammoths and other megafauna died only years to centuries after the dinosaurs, yet we find hair, collagen, and even DNA in these animals all the time. So why not in dinosaurs and trilobites?
  47. Contrary to what we might expect from a Flood geology scenario, deep reservoirs of groundwater are not remnants of ancient oceans, but were accumulated by infiltrating rain and snow. Whenever oil companies drill deep into sediments, they always encounter very salty water (called connate water), whichhasto be pumped before oil is accessible. It was originally thoughtthatthe salinity of these waters derived from the oceans in which thesedimentswere deposited, but their chemical and stable-isotope signatures contradicted this hypothesis. Flood geology has no room in its
    Polystrate tree fossil. Note the base of the stump is rooted in a more organic-rich deposit, while the top of the tree is truncated sharply. Photo from Wikipedia commons.

    Polystrate tree fossil. Note the base of the stump is rooted in a more organic-rich deposit, while the top of the tree is truncated sharply. Photo from Wikipedia commons.

    timeline for sedimentary rocks to have been ‘flushed out’ by infiltrating precipitation, because deposition would have to occur too rapidly. If the geologic column were deposited in a global flood, therefore, we should expect the groundwater trapped in deep sedimentary layers to be the very ocean water that once covered the Earth.

  48. Contrary to YEC claims, polystrate fossils are better interpreted by conventional geology and contradict the Flood geology paradigm. Most polystrate trees are rooted in organic-rich layers such as coal seams or paleosol beds. In other words, the trees were growing in place when covered abruptly by rising floodwaters, and were not uprooted and transported long distances. This means that after the formation of the coal/paleosol, there had to be time for a forest of trees to grow several meters, after which a large flood (not global, just the kind that would engage our National Guard today) buried whole stumps up to a couple meters with sand and mud. In all occurrences of polystrate trees, the tops of the trees are missing (truncated), having rotted off after they were exposed above the sediments for a long time.
  49. Fossilized burrows and marine trackways reflect everyday conditions in ancient ecosystems, where worms, trilobites, or molluscs dug calmly through soft mud on the seafloor in search of food. The claim that paleontologists have unanimously mistaken these trackways for escape efforts during a catastrophic flood is not only presumptuous, but it ignores the bulk evidence.

    Trilobite trackway in Cambrian sandstone. Image from PaleoSearch.

  50. Mudcracks are common features in layers of sand, silt, and clay that are interpreted to have formed in floodplains or shallow lakes and tidal flats. Despite decades of being aware of the problem, Flood geologists have not satisfactorily been able to explain why mudcracks cover thousands of individual layers throughout the rock record. These features do not form under water, but require an exposed, drying surface of semi-cohesive sediment.
  51. Ripples readily form in sandstone under flowing water, but not at speeds required by the Flood. Therefore, the common preservation of small ripples cannot be reconciled with the Flood model, but rather tells us that the sand must have been buried in calm seas with gentle waves.
  52. Raindrops on the surface of sedimentary layers—these are relatively self-explanatory. If we take Genesis as our guide, sedimentary layers could not be exposed during the course of the Flood, and so we should never expect to find raindrops imprinting their surface. Even if we do allow forthisunbiblical possibility, however, raindrops imprints cannot be preserved if they are swiftly covered by a new layer of sediment. For raindrops to become ‘fossilized’, theimprintmust be made in a semi-cohesive layer (i.e. one that is not saturated with water, but not completely hard), which needs time to
    A 15-million-year old piece of poop, called a coprolite. Image credit.

    A 15-million-year old piece of poop, called a coprolite. Image credit.

    harden slightly in the absence of flowing water before another layer is deposited on top. Raindrops in sediments contradict flood geology outright.

  53. Fossilized poop, called coprolite, is found throughout the fossil record alongside the animals that produced them. These paleontological oddities are indicative of normal ecological conditions and contradict any scenario in which the ‘poopers’ were catastrophically buried.
  54. The nature of the fossil record contradicts the expectation of ‘rapid burial’ for most land-dwelling organisms. By and large, terrestrial fossils are the weathered remains of animals, which were long exposed to the elements before disarticulating and washing into a river channel, lake, or floodplain. Vertebrate skeletons are almost never found intact, and more weather-resistant pieces (like tooth enamel) are preferentially preserved, suggesting that rapid (live) burial was an extreme rarity in geologic history.
  55. Fine sorting of marine microfossils is inconsistent with the Flood scenario, because specimens of foraminifera, radiolarians, and coccolithophores are approximately the same size. Therefore, these tiny shells should be scattered stochastically throughout the sedimentary record, if they were subject to the same hydrodynamic forces of a single global flood. Instead, individual species are commonly confined to narrow zones in the fossil record and used as index fossils for dating layers of marine sediments.
  56. Cast replica of footprints made by a mammal-like reptile in the Coconino Sandstone near Ash Fork, Arizona. Photo credit: PaleoScene.

    Fossilized tracks in eolian (desert dune) deposits, such as the Coconino and Navajo sandstones, are inconsistent with the young-Earth proposition that these sediments accumulated under water. Extremely high sustained flow rates (>2 m/s) of very deep waters (up to 100 m or more) are required to form dunes of comparable size to those in the Coconino and Navajo sandstones. At these flow rates, it would be impossible for any submerged animals (especially small reptiles) even to make contact with the sediment surface, let alone for any prints to be preserved.

  57. The occurrence of widespread, eolian sandstone formations negates any model that cites a worldwide flood to explain their deposition. Of course, Flood geologists attempt to argue that eolian sandstones must have been laid down by water (more than 100 meters deep, flowing more than 2 m/s), but ignore the preponderance of evidence, which is more consistent with dry dune deposition.
  58. Paleosols are sedimentary layers that show evidence of soil formation by plants and microorganisms. Typically they can be recognized by distinct mineral compositions or chemical signatures, but direct reworking of sediment through biological agents may also be observed (for example, in situ roots and carbonate nodules). Not all paleosols show the same degree of soil development, but all are indicative of a long-lasting stable surface. YEC’s are forced to reinterpret paleosols as artifacts of chemical modification after rapid burial during the Flood, but geologists have become acutely aware of how to distinguish between these processes and true soil horizons.
  59. Animal tracks in general are evidence of an exposed surface, on which sediments were somewhat coherent (i.e. not too soft, not too hard; imagine trying to preserve your own handprint in cement). Nonetheless, YEC’s have deemed trackways consistent with their paradigm, because they insist that the floodwaters receded and covered the land numerous times. Besides the fact that Genesis 8 tells us the surface was not exposed until very late in the flood (and so their model contradicts scripture), it is very unlikely that any tracks could be preserved in those conditions. Once the floodwaters returned, they would tend toward erosional processes (removal of the entire surface layer, tracks included). The Flood model firmly predicts the absence of trackways in the sedimentary record, but in fact they are abundant.
  60. Fossilized nests, e.g. from dinosaurs, are indicative of stable, everyday ecosystems, and not catastrophic flooding of the continents. Both nests and eggs are fragile, which explains their rarity in the rock record. But abrupt burial in a high-energy flood cannot possibly explain their occasional preservation.
  61. The Grand Canyon was eroded and widened slowly by annual precipitation, as evidenced by the fact that the North Rim lies further from the main course of the Colorado River. A very gentle slope causes more runoff to enter the canyon from the north side, which, as Wayne Ranney (2012) explains, allows “for more erosion in the side streams on the north side of the river. For this reason, the North Rim is eroded away from the river about twice as far as the South Rim.”
  62. The Grand Canyon itself is only deepened episodically during extremely high floods, which do not regularly occur in the modern climate of northern Arizona. Therefore, it must have taken numerous glacial cycles, during which the jet streams migrate southward and bring more rain/snow to the American southwest, to account for the great depth of the canyon today.
  63. The walls of the Grand Canyon contain numerous caves with speleothems, implying that the water table once stood high above its present position for extended periods of time. Catastrophic carving of the Grand Canyon cannot possibly explain these features, because it allows no time for caves to form and no mechanism by which they could be decorated with stalagmites and stalactites.
  64. Figure 1 from Noffke and Awramik (2013). Modern and ancient examples of stromatolites and microbially laminated structures.

    Figure 1 from Noffke and Awramik (2013). Modern and ancient examples of stromatolites and microbially laminated structures.

    Stromatolites and thrombolites are fine-laminated mounds built by algae and other microorganisms. These features not only take long periods of time to form, but their occurrence in repeated sedimentary layers argues strongly against catastrophic burial. They do not appear randomly in the geologic column, but are always positioned upright (in situ growth position) over wide areas within single layers of limestone—precisely what we’d expect if they grew in ancient oceans that slowly amassed limestone mud. Finally, these laminated mounds are frequently surrounded by fragmented shells of shallow-marine organisms typical of the same environment.

  65. Consistent patterns in magnetic reversals recorded on the seafloor strongly support the conventional model of plate tectonics, in which slowly forming oceanic basalts record the dominant magnetic signature at the time they were formed. YEC’s contend that these magnetic reversals occurred rapidly during the flood, but this proposal is easily falsified. If the entire Atlantic and Pacific basins formed during and/or shortly after the Flood, then Earth’s polarity would have reversed multiple times before oceanic basalts even had a chance to cool and preserve the signature! Flood geology thus predicts that either a single polarity signature should persist across ocean basins or the signature should be stochastic, with no striped pattern.
  66. Magnetic reversals recorded on the seafloor correlate to magnetic patterns in land sediments (e.g. Heller and Tung-Sheng, 1982; Cunningham et al., 1994; Ding et al., 1999), vastly improving the dating of continental deposits that lack datable layers of volcanic ash. Where ash layers do exist, they allow for independent dating of magnetic reversals on land by the Ar-Ar method. This independent corroboration of dates improves the strength of magnetic ‘stripes’ on the ocean floor as evidence for an ancient Earth.
  67. Earth’s magnetic field is not decaying exponentially, but has varied much less over the past 7–9,000 years (e.g. Korte et al., 2011; Nilsson et al., 2014). Magnetic field strength was weaker, not exponentially stronger, for much of this interval. Attempts to suggest that the Earth cannot be older than 10,000 years due to an exponential decay of Earth’s magneticfieldare based on a blind extrapolation of historical measurements (which span no more than 150 years) into the past. This approachignoresthe abundance of paleomagnetic data from human artifacts, sediments, and recent lava flows.

    Fig6cd_Nilssonetal2014

    Figure 6c-d from Nilsson et al., 2014. Modeled history of the dipole moment of Earth’s magnetic field over the past 9,000 years, based on magnetic field intensities recorded by archaeological and geological samples.

  68. The entire field of chemostratigraphy makes no sense within Flood geology. First, the stratigraphic shifts in chemistry—meaning, as we analyze rock chemistry from the bottom of the geologic column to the top—are too large to have occurred during a single year. This is true particularly of isotopes of carbon, sulfur, and strontium, because the amount of these elements dissolved in the ocean is too large to be greatly affected within a short period of time. It would be like trying to change the water color of a swimming pool by dumping in a few cups of coffee!
  69. Event stratigraphy, which utilizes abrupt shifts in rock chemistry as time markers, helps geologists to correlate sedimentary rocks from very different parts of the world. When we examine sequences of sedimentary rocks that are rich in fossils, the order and timing of chemical events just happens to correspond to the order and timing of fossil events (e.g. the disappearance or first appearance of certain fossil species). This correspondence is not possible in the flood geology model, however, since the ordering of fossils in various parts of the world could not have been a matter of timing (i.e. it couldn’t depend on which day of the Flood they were buried).
  70. The mere existence of isotopes is not predicted by the young-Earth paradigm, but makes sense only in conventional astrophysics. Nearly all elements of the periodic table exist in various isotopes, due to their being formed in the process of stellar evolution. As stars grow larger, heavier elements are produced through nuclear synthesis. Outside of this mechanism, we should not expect isotopes to be a common feature in basic chemistry.
  71. Short-lived isotopes are detectable only from distant supernovas. These are unstable elements that decay relatively rapidly after formation and so should be absent in a 4.5-billion-year Earth. This discrepancy provides unambiguous support for the conventional age of our solar system and models of stellar evolution.
  72. Radiometric dating of chondritic meteorites is consistent between methods and yields ages of 4.56 billion years for our solar system. It is currently inconceivable how this date could be wrong by a factor of 1 million.
  73. Potassium-argon dating is well known for its potential problems, but still provides one of the best methods for dating ancient volcanic flows. Even when excess argon is originally present, as is evident in the dating of certain historical eruptions, the date is only apparently too old by a few million years at most. Therefore, K-Ar dates in excess of tens or hundreds of millions of years tell us clearly that the Earth is not young, because otherwise, we could not explain such high concentrations of argon in these volcanic rocks.
  74. The Argon-Argon technique removes most uncertainties about the original presence of excess argon in samples, confirming that K-Ar dates are both real and generally accurate. Corroboration of Ar-Ar dates by other methods—e.g. when applied to the Cardenas Basalts of the Grand Canyon—further improves our confidence in the respective techniques.
  75. Uranium-Lead dating techniques consider the decay of multiple isotopes (238U, 235U, and 232Th) into stable forms of lead. If the respective half-lives of these elements changed significantly in the past, then the technique simply wouldn’t work, because each half-life is vastly different. Accelerated nuclear decay, in other words, would result in massive discordance between age estimates from each decay chain. However, the U-Th-Pb method, especially when applied to pristine zircons, provides one of the most precise geochronometers for the bulk of Earth history.
  76. Flood geologists cannot account for the abundance of 230Th in secondary calcite deposits, such as speleothems, carbonate lake sediments, and corals. Since thorium is not soluble in oxidized water, these formations originally contained none. Therefore, present concentrations can only be accounted for by radioactive decay of 234U into 230Th, which has a half-life of 245,000 years. If modern corals, lakes, and cave deposits formed only after a global flood, some 5,000 years ago, then none should yield dates older than this.
  77. Cosmogenic dating utilizes short-lived isotopes that are created in situ by incoming solar radiation or high-energy particles from space. When rocks are exposed to the atmosphere, such as large boulders on the side of a mountain, they accumulate short-lived isotopes. When rocks and minerals are hidden, through burial under sediments or ice, short-lived isotopes decay at a known rate. Through a variety of methods, geologists have used cosmogenic dating methods to constrain the buildup and retreat of large ice sheets, development of alluvial fans, river plains, deserts, and other surface features across Earth. Of course, these dates invariably suggest that the most recent deposits on Earth are not less than 10,000 years.
  78. There is too much helium in zircons, contrary to what Russell Humphreys has conjectured in his unscientific analysis. Geologists regularly use the amount of helium in certain minerals to constrain rates of tectonic uplift, because it accumulates at a known rate (dependingonthe concentration of Uranium/Thorium), so long as the mineral stays below a threshold temperature. This method (U-Th-Hethermochronology) regularly yields ages of tens of millions of years, which is to say that many millions ofyearswere required to account for modern concentrations of helium.

    F14.large

    Cartoon illustration to explain formation of a particular type of ophilolite. From Rolland et al. (2010).

  79. Ophiolites are remnants of ancient oceanic crust, which have been thrust onto the continent. Geologists were originally confused by the large bodies of ultramafic (super rich in Fe and Mg) rocks on land. But by studying the chemistry and mineral composition of ophiolites, geologists recognized their oceanic origin and could identify the processes responsible for their formation. As it turns out, most ophiolites were formed near subduction zones (e.g. like we find around the Phillipines), and not in mid-ocean ridges. We know this because subduction of ocean sediments and crust influences the chemistry of newly formed lavas in a very specific way. And so, ophiolites tell a much longer story than the YEC could allow, in which 1) ancient (pre-Flood?) oceanic crust began to buckle until one plate subducted beneath another, 2) forming an island chain like Japan, which 3) began to stretch away from the continent, 4) allowing new oceanic crust to form, until 5) the entire suite was crumpled up as the island chain collided with the main continent, 6) ultimately preserving portions of the ocean crust and overlying sediments on land. Each of these steps requires more than a few thousand years.
  80. Cosmogenic beryllium (10Be) is present in volcanic emissions above young subduction zones, but absent in older ocean sediments. This radioactive isotope is formed continuously in the atmosphere, much like radiocarbon, but has a much longer half life. It is useful in dating certain marine cores, since the concentration of 10Be decreases with depth—as expected if the ocean sediments accumulated over millions of years. The fact that 10Be is present in younger subduction zones, such as the Lesser Antilles, indicates that ocean sediments were subducted and then recycled back into recent volcanic flows within a few million years. Since 10Be is absent, however, from the majority of volcanic emissions and from ocean sediments that are older than Pliocene in age, we can be confident in their conventional ages (>5 million years).
  81. Large igneous bodies take time to cool, such as those that comprise the core of the Sierra Nevadas, Andes, Rocky Mountains, and other large mountain belts around the world. Even in the presence of circulating waters, the sheer amount of heat originally present in magmatic intrusions requires hundreds of thousands to millions of years to dissipate, before the magma may crystallize completely into solid rock. This process is slowed significantly by overlying sediments, which act as insulators.
  82. Coarse-grained granite from the Town Mountain Granite.

    Coarse-grained granite from the Town Mountain Granite.

    Coarse grains in igneous intrusions confirm that they indeed cooled very slowly, and not by rapid dissipation of heat via water or any other process. Only slow cooling allows for large, distinct minerals to form (called phaneritic texture), as is common in granite and diorite. Whenever you find a rock that resembles the image to the right, you have met a witness against the young-Earth paradigm.

  83. The intrusive igneous rocks exposed today were formed at great depths, indicating that miles of solid rock had to be weathered and eroded in the past. Even under catastrophic conditions, this process alone could take tens of millions of years. Today, granite exposures such as in the iconic Yosemite Valley continue to uplift in response to the removal of the overlying rock.
  84. Volcanic sills, which are intruded between sedimentary strata, require that the layers be hardened first. Otherwise, these lava injections have no physical guide that would confine their shape to lateral sheets of basalt. It is the brittle break between solid sedimentary rocks that causes volcanic sills to parallel the direction of bedding. Where is there time in Flood geology for sediments to harden completely, then to fracture and allow injection to form a sill, and finally time for cooling of the lava itself into solid rock? Volcanic dykes similarly require brittle fractures in the rock layers to explain their shape.
  85. Volcanic island chains, such as Hawaii, elucidate the multimillion-year effects of plate tectonic theory. Migrating lithospheric plates (and/or ‘hot spots’) cause the center of volcanic activity to migrate in a roughly linear pattern, resulting in a long chain of individual islands (which themselves are large volcanoes). Radiometric dating of volcanoes, from recently active to long extinct, confirms the predicted rate of plate motion based on modern observed values.
  86. Even if one rejects these dates, we must still account for the sheer size of the subaqueous mountain belts, which form gradually by periodic eruptions. It takes time for one deposit to cool and solidify, before another can be laid on top. Otherwise, a 33,500-foot shield volcano could not form, but only a relatively flat plateau of flood basalts on the seafloor.
  87. Extent of the Siberian Traps. Image from Wikimedia Commons.

    Extent of the Siberian Traps (blue line). Documented lava deposits shown in red; tuff in purple. Image from Wikimedia Commons.

    Volcanoes would have destroyed all life on Earth, assuming that volcanic deposits now preserved in the geologic column had to have formed during a single year. Massive eruptions have been well preserved, for example, in the Deccan traps (Siberia) or in flood basalts of the Snake River basin (northwestern U.S.). Geologists have modeled the impact of these individual lava flows on terrestrial and ocean life, and consistently conclude that each could have contributed to dramatic climate change and major extinction events. But these models assume that lava of the Deccan traps, for example, erupted over hundreds of thousands of years. Cumulatively—and if we require that all eruptions took place during the Flood year—these volcanic flows would have poisoned the oceans with heavy metals and saturated the atmosphere with carbon dioxide and sulfur gases. The sheer amount of carbon dioxide would have driven the oceans toward acidic conditions too vile for any surface life.

  88. Carbon dioxide emissions from volcanic events would have driven atmospheric concentrations to ~50,000 ppm or more. That’s more than 1,000 times what we find today! There is no evidence, however, for the extreme heating of Earth’s surface that inevitably would have ensued (on the contrary, YEC’s believe an ice age followed the Flood). Additionally, not enough time has passed since the Flood for such high levels to have equilibrated to those observed prior to the modern industrial age. The mass of volcanic deposits within the geologic column precludes the Flood geology model entirely.
  89. Large metamorphic bodies do not form rapidly, but require hundreds of thousands to millions of years worth of circulating waters under intense heat and pressure. The notion that catastrophic plate tectonics can explain the metamorphism of extensive mountain belts has no basis in physical science.
  90. Large sphalerite (zinc sulfide) crystals forming in ore body. Image from MGG&MS.

    Large sphalerite (zinc sulfide) crystals forming in ore body. Image from MGG&MS.

    Gemstones and other rare minerals form by slow accumulation of rare elements in magma or in water circulating through rocks. The greater the size, purity, and quality of gemstones, the longer it would have taken to form them. Gemstones are thus a testament to the antiquity of the Earth.

  91. Radiogenic isotopes in rocks from the crust to the deep mantle indicate a long history of chemical evolution deep within the Earth. As large igneous bodies cooled at the surface to create continental and oceanic crusts, some elements preferentially were incorporated into solid minerals, while others remained preferentially in the liquid mass in the mantle. This chemical differentiation explains very well the difference in isotope ratios between the crust and deep mantle rocks, assuming that it occurred over several billion years. Young-Earth geologists, on the other hand, cannot explain the most basic geochemical features of the Earth’s crust and mantle.
  92. Catastrophic plate tectonics is the only way to explain the bulk evidence for plate tectonic theory in a young-Earth timeline. But two major problems arise: excess heat and lack of a viable mechanism. Though YEC’s feel they have been able to model rapid subduction of the Earth’s crust (accounting for the mechanism), they certainly cannot explain how this process did not destroy the Earth’s surface in a giant heat death. Excess heat must have transferred to the oceans and the crust, which would destroyed all life on Earth.
  93. There is no evidence of excess heating from catastrophic plate tectonics. According to John Baumgardner, the excess heat diffused by evaporating a ~1.5-km-thick column of water over the oceans. He claims this is a answer to the ‘heat problem’ above, which he believes is physically “comprehensible”. But the geologic record shows no evidence of large scale heating of the oceans, such as might be expected in stable-isotope proxies that work as paleothermometers (such as δ18O and Mg/Ca in carbonates or δD in clay minerals).
  94. Cross section of oceanic crust at a mid-ocean ridge. Image from a lecture slide here.

    Cross section of oceanic crust at a mid-ocean ridge. Image from a lecture slide found here.

    Catastrophic plate tectonics cannot explain detailed formation of new oceanic crust, as is observed today at mid-ocean ridges. Oceanic crust is not a homogenous mass of basalt, but develops distinct textures from top to bottom, due to different cooling rates and chemical composition. If the ocean floor had to form rapidly (in a matter of years), we should not find these textures in older sections of oceanic crust, far away from modern spreading ridges.

  95. Seafloor basalt is modified geochemically by hydrothermal vents that form in fissures near mid-ocean ridges. These vents are powered by hot, upwelling seawater that originally infiltrated far away from the ridge, where temperatures are much cooler. However, the catastrophic plate tectonic model allows no time for this process and would have created a seafloor that was entirely too hot for effective hydrothermal circulation. Therefore, the catastrophic model is falsified by the thousands of studies of the ocean floor, which find evidence of alteration of seafloor basalts in very old parts of the crust (such as the western Pacific).
  96. Radiometric dating of seafloor basalt has produced a famously coherent pattern of increasing age away from mid-ocean ridges. The mapbelowis constructed by compiling thousands of analyses from dozensofindividual studies across the globe. Though young-Earth geologists will argueagainstthe validity of absolute ages, they still must explain the overall pattern, which makes no sense intheirparadigm (even invoking accelerated nuclear decay).

    Age distribution of the ocean floor; image and data compilation from NOAA.

    Age distribution of the ocean floor; image and data compilation from NOAA.

  97. The relative abundance of elements in the cosmos shows distinct patterns that make little sense in the young-Earth paradigm. For example, hydrogen and helium are super abundant compared to lithium, beryllium, and boron. Furthermore, elements of even atomic number are ~10 times more abundant than elements of odd atomic number. These relationships make sense in conventional astrophysics, because elements are produced over millions of years in dense stars through a process called nuclear synthesis. But YEC’s must explain them ad hoc:God simply created them like this.

    Relative abundance (on a logarithmic scale) of elements in our universe.

    Relative abundance (on a logarithmic scale) of elements in our universe.

  98. Components of our solar system, including the sun, meteorites, and planets, have approximately the same chemical composition (if volatile elements are excluded). This coincidence is shocking, unless we allow that each was drawn from a primordial mass, as described by the nebular hypothesis.
  99. Even the RATE team, a YEC think-tank seeking to undermine geochronology, has found no meaningful objection to the validity of radiometric dating techniques. Their proposal that radioactive decay rates increased by as much as a million times in the recent past is essentially a concession that geochronology works (they just refuse to accept the results), because…
  100. Accelerated nuclear decay is science fiction. Neither the physics nor the math produces a result in which radiometric dates yield consistently large ages for rocks and minerals in our solar system. One cannot tweak the physical properties of atoms, so as to increase the rate of radioactive decay, without all hell breaking loose—literally. Rates of decay depend on the stability of individual atoms, so if unstable atoms became more unstable, we’d expect stable atoms also to become very unstable, which would be the undoing of the physical universe as we know it. These are not conditions through which an Ark of humans and animals ever could have survived.
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