Smoky Hill Chalk Member
Geology
Group: Colorado
Formation: Niobrara
Lithologies: not reported (32), mudstone (1), "shale" (10), lime mudstone (7), chalk (78), "limestone" (2), "carbonate" (1)
Paleoenvironments: marine indet. (62), terrestrial indet. (1), carbonate indet. (25), deep subtidal shelf (3), offshore ramp (7), offshore indet. (27), basinal (carbonate) (1), coastal indet. (1), offshore (3)
Collections