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The Big Five Mass Extinctions:

End Ordovician, 444 million years ago, 86% of species lost
— Graptolite 2-3 cm length
Late Devonian, 375 million years ago, 75% of species lost
— Trilobite, 5 cm length
End Permian, 251 million years ago, 96% of species lost
— Tabulate coral, 5 CM
End Triassic, 200 million years ago, 80% of species lost
— Conodont teeth 1 mm
End Cretaceous, 66 million years ago, 76% of all species lost
— Ammonite 15 cm length


3 posted on 06/04/2017 1:22:13 PM PDT by sodpoodle (Life is prickly - carry tweezers)
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To: sodpoodle

I really doubt if the rich criminal gore can read.


4 posted on 06/04/2017 1:27:20 PM PDT by hal ogen (First Amendment or Reeducation camp?)
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To: hawg-farmer - FR..October 1998

credit for comment#2 to Hawg-farmer.

copied from an earlier thread.


5 posted on 06/04/2017 1:28:31 PM PDT by sodpoodle (Life is prickly - carry tweezers)
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