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Allen or Rio Colorado Formation?



Can someone please tell me what the difference is between the Allen and Rio
Colorado Formations?  They are listed under the same heading in the
stratigraphy section of The Dinosauria, but I always thought the Rio
Colorado was Turonian and the Allen was Maastrichtian.  Also, what part of
the Late Cretaceous does the Bauru Formation date from?  Thank you.

Mickey Mortimer