Where: Tehama County, California (40.0° N, 122.5° W: paleocoordinates 38.0° N, 71.7° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Buchia pacifica other zone, Valanginian (139.8 - 132.9 Ma)

• Valanginian. At top of Buchia pacifica zone.

• bed-level stratigraphic resolution

Environment/lithology: marine; lithology not reported

Size class: macrofossils

Collected by R. W. Imlay and William O. Ross in 1967; reposited in the USNM

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: taxonomic analysis

PaleoDB collection 225864: authorized by Jonathan Marcot, entered by Jonathan Marcot on 06.06.2022

Creative Commons license: CC BY (attribution)