Inoceramus (Tethyoceramus) cf. alpinus Heinz, 1932

Remarks

• Collector:    Professor Norm King, University of Southern Indiana

• Formation:  Niobrara Group, top of the Fort Hays Limestone

• Location:     Trego County, Kansas

General Info

Stratigraphic Occurrence                                

(Includes reports of several species)

• Niobrara Grp, Fort Hays Ls of eastern CO and western KS and southeastern WY

• Colorado Grp, Marias River Fm, Kevin Member of northern Montana

• Colorado Grp, Marias River Fm, Cone Member of northern Montana

• Colorado Grp, Colorado Sh of central Montana

• Early Coniacian rocks of the Caucasus

• Early Coniacian rocks of the Czech Republic

• Early Coniacian rocks of Germany

• Early Coniacian rocks of Poland

• Early Coniacian rocks of Russia

• Early Coniacian rocks of the Ukraine

Age

• Inoceramus (Tethyoceramus) ranges from the I. (C.) deformis erectus (Meek)to the I. (C.) crassus crassus (Petrascheck) zones of the Western Interior, middle Early Coniacian to late Early Coniacian Stage (~88 mya).  In Europe, species are known from the I. (C.) crassus crassus (Petrascheck) and I. (C.) deformis dobrogensis (Szász) zones.

Geographic Occurrence (not an all-inclusive list, which includes several species)

• Cascade County, MT

• Caucasus

• Czech Republic

• Germany

• Laramie County, WY

• Poland

• Russia

• Toole County, MT

• Trego County, KS

• Ukraine

Remarks

For identification, descriptions, and range see:

• Kauffman, E. G.; Sageman, B. B.; Kirkland, J. I.; Elder, W. P.; Harries, P. J.; Villamil, T. 1993.  "Molluscan Biostratigraphy of the Cretaceous Western Interior Basin, North America".  In:  Caldwell, W. G. E.; Kauffman, E. G., eds. Geological Association of Canada Special Paper 39, 397–434

• Walaszczyk, I.; Cobban, W. A.  2000.  Inoceramid Faunas and Biostratigraphy of the Upper Turonian-Lower Coniacian of the Western Interior of the United States.  Palaeontological Association, Special Papers in Palaeontology 64.