Hannatoma K: Kreyenhagen Shale: California (Stone) (Eocene of the United States)

Where: California (37.0° N, 120.1° W: paleocoordinates 36.0° N, 109.1° W)

• coordinate based on political unit

When: Kreyenhagen Shale Formation, Late/Upper Eocene (37.2 - 33.9 Ma)

Environment/lithology: marine

Size class: microfossils

Collection methods: Dr. C.C. Church supplied these samples from the Kreyenhagen shale of California.

Primary reference: J. W. Durham, A.N. Dusenbury, Jr, H.D. Hedberg, L. Kehrer, J.G. Marks, R.M. Stainforth, and B. Stone. 1949. The age of the Hannatoma mollusk fauna of South America; a symposium. Journal of Paleontology 23(2):145-160 [L. Ivany/C. Visaggi/C. Visaggi]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 42869: authorized by Linda Ivany, entered by Christy Visaggi on 06.08.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Hastigerinella
  -
Rotaliina
 Planorbulinacea - Cibicididae
 Buliminacea - Buliminidae
 Discorbacea - Bagginidae
Valvulineria tumeyensis Cushman and Simonson 1944
 Rotaliacea - Rotaliidae
Gyroidina soldanii
Gyroidina soldanii var. octocamerata
 Rotaliina - Bolivinidae
Bolivina sp. d'Orbigny 1839
Hantkenina
  -
Pseudoglandulina
  -
Stichocassidulina
  -
Lagenina
 Nodosariacea - Nodosariidae