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Here is more information on tree fossils, including the irrelevance of the
Spirit Lake comparison. The biggest issue is a confounding of the rate of
deposition of a sedimentary formation (consisting of numerous beds) and the
rate of deposition of a single bed, which may be very rapid or very slow,
depending on the sedimentary environment.
http://www.talkorigins.org/faqs/polystrate/trees.html
For a creationist view see http://www.apologeticspress.org/articles/184 This
article is full of pseudo-citations (nearly self-referential links to other
creationist writers), and also follows the usual creationist practice of
posing questions ("How could this be?" or "How could this not be?") This
sort of questioning can appear genuine to novice audiences, but is a
non-scientific approach as there is never an independent hypothesis advanced
by the authors to explain the evidence.
Dave Smith
On Mon, Jul 13, 2009 at 2:35 PM, Jack W Cannon <[log in to unmask]>wrote:
> ISEN-ASTC-L is a service of the Association of Science-Technology Centers
> Incorporated, a worldwide network of science museums and related
> institutions.
>
> *****************************************************************************
>
> I wish to extend my thanks to both Marc and Erich for the explanations of
> possible causes of vertical columns within sedimentation layers. Geology is
> one area that I have never had the opportunity to study. So these
> explanations are particularly helpful to me.
>
> Dr Harrub led into this subject matter with a picture of Spirit Lake after
> the Mount St. Helens eruption. There were a lot of logs (trees stripped of
> their branches) floating in the lake. He claimed that as these trees became
> waterlogged and eventually sunk, they did so in an upright position and
> remained upright as they settled on the bottom. Since trunks do not last
> very long, the sedimentation surrounding the trees could not be millions of
> years old. According to him, that proved his claim that all sedimentation
> layers are the same age.
>
> Jack Cannon
>
>
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--
David L. Smith
Da Vinci Science Center
Allentown, PA
http://www.davinci-center.org
Please consider the environment before printing this email.
Everything that needs to be said has already been said. But since no one was
listening, everything must be said again. -- Andre Gide
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For information about the Association of Science-Technology Centers and the Informal Science Education Network please visit www.astc.org.
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