USGS Mesozoic loc. 29612, Bear Creek (Cretaceous of the United States)

Where: Colusa County, California (39.1° N, 122.4° W: paleocoordinates 37.1° N, 71.8° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Valanginian (139.8 - 132.9 Ma)

• bed-level stratigraphic resolution

Environment/lithology: marine; lithology not reported

• ENVIRONMENT: Not stated in text.

Size class: macrofossils

Collected by E. I. Rich in 1965; reposited in the USNM

Collection methods: surface (in situ),

Primary reference: R. W. Imlay and D. L. Jones. 1970. Ammonites from the Buchia zones in northwestern California and southwestern Oregon. United States Geological Survey Professional Paper 647-B:B1-B59 [J. Marcot/J. Marcot]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 225871: authorized by Jonathan Marcot, entered by Jonathan Marcot on 06.06.2022

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Cephalopoda
 Ammonitida - Polyptychitidae
Tollia cf. mutabilis
Tollia cf. mutabilis Stanton 1895 ammonite