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Baculites yokoyamai

Geological Range

Cenomanian to Coniacian

Paleogeographic Distribution

Texas to South Dakota

Stratigraphic Occurrences

Coniacian
Frontier Formation (WY)
Turonian
Acadia Park Shale (TX)
Carlile Shale (SD)
Carlile Shale (WY)
Carlile Shale (Turner Sandy Member) (WY)
Chispa Summit Formation (TX)
Greenhorn Limestone (Bridge Creek Member) (CO)
Greenhorn Limestone (Pfeifer Member) (KS)
Mancos Shale (Rio Salado Tongue) (NM)
Niobrara Formation (NM)
Cenomanian
Chispa Summit Formation (TX)
Unknown Stage
Niobrara Formation (NM)
<i>Baculites yokoyamai</i> from the Turonian Mancos Shale (Rio Salado Tongue) of Cibola County, New Mexico (USNM 328706). Image modified from Pl. 1, Figs 4-7 in Cobban and Hook (1983, in New Mexico Bureau of Mines & Mineral Resources Memoir 41). Image used with permission.
Baculites yokoyamai from the Turonian Mancos Shale (Rio Salado Tongue) of Cibola County, New Mexico (USNM 328706). Image modified from Pl. 1, Figs 4-7 in Cobban and Hook (1983, in New Mexico Bureau of Mines & Mineral Resources Memoir 41). Image used with permission.
<i> Baculites yokoyamai </i> from the Turonian Greenhorn Limestone Fm. of Russell County, Kansas (KUMIP 82154).
Baculites yokoyamai from the Turonian Greenhorn Limestone Fm. of Russell County, Kansas (KUMIP 82154).
<i> Baculites yokoyamai </i> from the Turonian Greenhorn Limestone Fm. of Russell County, Kansas (KUMIP 82155).
Baculites yokoyamai from the Turonian Greenhorn Limestone Fm. of Russell County, Kansas (KUMIP 82155).
Stratigraphic position unknown
Stratigraphic position unknown