Where: Colusa County, California (39.3° N, 122.3° W: paleocoordinates 40.5° N, 82.8° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Pacheco Group, Cenomanian (100.5 - 93.9 Ma)

• Strata of Pacheco Group are folded into an anticline here. The eastern limb is faulted up exposing about 800 ft in an escarpment facing the west. Cenomanian in age.

• bed-level stratigraphic resolution

Environment/lithology: marine

Size class: macrofossils

Reposited in the CAS

• Collected by Cook and Kirby. Collections reposited at CAS.

Primary reference: F. M. Anderson. 1958. Upper Cretaceous of the Pacific Coast. Geological Society of America Memoir 71:1-378 [A. Miller/A. Hendy/M. Clapham]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 44203: authorized by Austin Hendy, entered by Austin Hendy on 04.09.2004, edited by Jonathan Marcot

Creative Commons license: CC BY (attribution)