Where: Butte County, California (39.8° N, 121.7° W: paleocoordinates 47.1° N, 90.3° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Tenmile Member (Chico Formation), Early/Lower Campanian (83.5 - 70.6 Ma)

• Middle of the exposed section, 1225 ft above its base. The complete thickness of the Chico Formation is not exposed anywhere, since its upper beds are overlain by the volcanic Tusacan Formation. The greatest thickness of the Chico exposed in the region is in Big Chico Creek, where it reaches about 2000 ft.

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified sandstone

Size class: macrofossils

Collected by H.A. Taff, G.D. Hanna, C.M.Cross in 1934; reposited in the CAS

Collection methods: quarrying,

Primary reference: J. A. Taff, G. D. Hanna, and C. M. Cross. 1940. Type locality of the Cretaceous Chico formation. Geological Society America Bulletin 51(9):1131-1328 [J. Marcot/J. Marcot]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 44277: authorized by Austin Hendy, entered by Austin Hendy on 08.09.2004, edited by Jonathan Marcot and Matthew Clapham

Creative Commons license: CC BY (attribution)