Graneros Shale Formation
Geology
Group: Colorado
Members: unnamed (9), Thatcher Limestone (1)
Lithologies: claystone (1), "shale" (7), sandstone (1), "limestone" (2)
Paleoenvironments: marine indet. (7), carbonate indet. (1), offshore (2)
Age range: base of the Early/Lower Cenomanian to the top of the Cenomanian or 99.60000 to 93.90000 Ma
Collections
Time interval | Ma | Country or state | Original ID and collection number |
---|---|---|---|
Cenomanian | USA (Montana) | (130808) | |
Cenomanian | USA (Colorado) | (230801) | |
Cenomanian | USA (Iowa) | (88017) | |
Early/Lower Cenomanian | USA (Colorado) | (77350) | |
Late/Upper Cenomanian | USA (Iowa) | (88008 88009) | |
Middle Cenomanian | USA (Wyoming) | (123469) | |
Middle Cenomanian | USA (Nebraska) | (213308 213401) | |
Middle Cenomanian | USA (Kansas) | (117816) |