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how's it known where Cambrian strata begin?

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dfo...@gl.umbc.edu

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Apr 8, 2008, 1:23:08 PM4/8/08
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How is it known where pre-Cambrian strata end and Cambrian strata
begin?


Aidan Karley

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Apr 29, 2008, 12:35:07 PM4/29/08
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In article <ftg9ls$1397$1...@darwin.ediacara.org>, wrote:
> How is it known where pre-Cambrian strata end and Cambrian strata
> begin?
>
You look for the fossils in your section under consideration.
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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