Guinea Corn Formation
Geology
Members: unnamed (161), A Beds (1), B3 Beds (1), D Beds (1), LC1 Beds (1), Yankee River (1)
Lithologies: mudstone (14), "shale" (19), siltstone (28), sandstone (1), marl (5), lime mudstone (5), floatstone (4), rudstone (11), "limestone" (104), "carbonate" (1), "volcaniclastic" (1)
Paleoenvironments: marine indet. (80), carbonate indet. (3), shallow subtidal indet. (76), open shallow subtidal (3), reef, buildup or bioherm (4), coastal indet. (1)
Age range: base of the Late/Upper Maastrichtian to the top of the Early/Lower Maastrichtian or 70.60000 to 66.00000 Ma
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