History of Cretaceous

	Revision 8 . . October 19, 2001 7:55 am by Don Kenney [AddedFaunal Zones]
	Revision 7 . . (edit) June 29, 2001 6:57 am by Lee Daniel Crocker

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Added: 4a5,19

The Cretaceous is usually broken into Lower, Middle, and Upper subdivisions. The Faunal stages from youngest to oldest are: Maastrichtian/Navarro? (Senonian/Eagle? Ford/Austin?/Gulf?/Upper? Cretaceous) Campanian/Taylor? (Senonian/Eagle? Ford/Austin?/Gulf?/Upper? Cretaceous) Santonian (Senonian/Eagle? Ford/Austin?/Gulf?/Upper? Cretaceous) Coniacian (Senonian/Eagle? Ford/Austin?/Gulf?/Upper? Cretaceous) Turonian (Gallic/Nuevo? Leon/Trinity?/Lower? Cretaceous) Cenomanian/Woodbine? (Gallic/Nuevo? Leon/Trinity?/Lower? Cretaceous) Albian/Frederiksberg? (Gallic/Nuevo? Leon/Trinity?/Lower? Cretaceous) Aptian (Gallic/Nuevo? Leon/Trinity?/Lower? Cretaceous) Barremian (Gallic/Nuevo? Leon/Trinity?/Lower? Cretaceous) Hauterivian (Neocomian/Durango?/Lower? Cretaceous) Valanginian (Neocomian/Durango?/Lower? Cretaceous) Berriasian (Neocomian/Durango?/Lower? Cretaceous)