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how>s it known where Cambrian strata begin?
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PostPosted: Tue Apr 08, 2008 5:23 pm    Post subject: how>s it known where Cambrian strata begin? Reply with quote
How is it known where pre-Cambrian strata end and Cambrian strata
begin?
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Aidan Karley
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PostPosted: Tue Apr 29, 2008 4:35 pm    Post subject: Re: how>s it known where Cambrian strata begin? Reply with quote
In article <ftg9ls$1397$1@darwin.ediacara.org>, wrote:
[quote]How is it known where pre-Cambrian strata end and Cambrian strata
begin?

You look for the fossils in your section under consideration.[/quote]
The level at which you start to see "small shelly fossils" in the rocks
marks the base of the Cambrian.

--
Aidan Karley,
Aberdeen, Scotland
Written at Wed, 16 Apr 2008 08:22 +0100, but posted later.
09 F9 11 02 9D 74 E3 5B D8 41 56 C5 63 56 88 C0
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