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Inoceramus grandis

Geological Range

Cenomanian to Maastrichtian

Paleogeographic Distribution

Kansas to Montana

Stratigraphic Occurrences

Maastrichtian
Pierre Shale (WY)
Campanian
Pierre Shale (MT)
Pierre Shale (WY) [Campanian]
Santonian
Niobrara Formation (Smoky Hill) (KS)
Coniacian
Niobrara Formation (Smoky Hill Member) (KS)
Niobrara Formation (Fort Hays Member) (KS)
Niobrara Formation (NE)
Cenomanian
Frontier Formation (WY)
Unknown Stage
Niobrara Formation (NM)
Pierre Shale (WY)
<i>Inoceramus grandis</i> fom the Niobrara Formation (Smoky Hill Member) of Ellis County, Kansas (FHSMIP 1457).
Inoceramus grandis fom the Niobrara Formation (Smoky Hill Member) of Ellis County, Kansas (FHSMIP 1457).
<i>Inoceramus grandis</i> from the Niobrara Formation of Trego County, Kansas (KUMIP 137946).
Inoceramus grandis from the Niobrara Formation of Trego County, Kansas (KUMIP 137946).
Stratigraphic position unknown
Stratigraphic position unknown