Skip to Main Content

Cremnoceramus deformis

Geological Range

Cremnoceramus deformis Zone:  Lower Coniacian

Turonian to Coniacian

Paleogeographic Distribution

Texas to Montana

Stratigraphic Occurrences

Coniacian
Boquillas Formation (TX)
Frontier Formation (WY)
Gallup Sandstone (NM)
Marias River Formation (MT)
Niobrara Formation (Fort Hays Member) (CO)
Niobrara Formation (Fort Hays Member) (KS)
Niobrara Formation (WY)
Turonian
Niobrara Formation (CO)
Unknown Stage
Austin Chalk (TX)
Cody Shale (MT)
Niobrara Formation (CO)
Niobrara Formation (Smoky Hill Mbr) (KS)
<i>Cremnoceramus deformis</i> from the Niobrara Formation (Fort Hays Member) of El Paso County, Colorado (FHSMIP 1773).
Cremnoceramus deformis from the Niobrara Formation (Fort Hays Member) of El Paso County, Colorado (FHSMIP 1773).
Stratigraphic position unknown
Stratigraphic position unknown