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Author Topic:   The world and evironment 5767 years ago.
PaulK
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Posts: 17827
Joined: 01-10-2003
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Message 26 of 100 (352144)
09-25-2006 2:47 PM
Reply to: Message 21 by Faith
09-25-2006 2:36 PM


quote:
Trilobites.
Dinosaurs.
Archaeopteryx.
NONE of these are found in all strata. Trilobites first appear in the Cambrian and are not found after the Permian. There are no dinosaurs before the Triassic, and unless you include birds none are found after the Cretaceous. Archaeopteryx is only found in the Jurassic.
A far better candidate would be cyanobacteria. I doubt that there is anything more complex which you could even hope to find in all geological periods.

This message is a reply to:
 Message 21 by Faith, posted 09-25-2006 2:36 PM Faith has not replied

Replies to this message:
 Message 56 by Aquilegia753, posted 12-28-2007 9:59 PM PaulK has not replied

  
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