ammonites
California (White-Inyo Mtns.) Poleta Fm. (Cambrian of the United States)

Where: California (36.2° N, 118.0° W: paleocoordinates 1.0° S, 100.2° W)

• coordinate based on political unit

When: Nevadella zone, Poleta Formation, Caerfai (530.0 - 513.0 Ma)

• lower cambrian, Nevadella zone

Environment/lithology: offshore; green shale

• "shaly facies (dark greenish sh), offshore (BA4?); some tidal channels (currents) but seaward of ba[nk? illeg.] non-ororgenic miogeocline"

Primary reference: J. J. Sepkoski Jr. 1998. Rates of speciation in the fossil record. Philosophical Transaction of the Royal Society Biological Sciences 353(1366):315-326 [J. Sepkoski/M. Sommers/A. Clement] more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 177: authorized by Jack Sepkoski, entered by Mike Sommers on 20.11.1998