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Re: Idle question on Cretaceous chronostratigraphy
Andreas Johansson writes:
The Cretaceous is the longest period of the Phanerozoic, yet also the
only one divided into only two epochs (Lower and Upper Cretaceous) in
the ICS chart. Is there a rational explanation for this somewhat
surprising state of affairs, or did it just "happen"?
Quite a few papers refer to a non-official 'Mid Cretaceous'. This is
understandable, since calling something around 100 million years old 'Late
Early Cretaceous' or 'Early Late Cretaceous' is fairly cumbersome.
GIS / Archaeologist http://www.geocities.com/dannsdinosaurs
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