USGS 525 (Jurassic of the United States)

Where: California (40.1° N, 120.8° W: paleocoordinates 33.5° N, 60.5° W)

• coordinate based on nearby landmark

When: Mormon Formation, Bajocian (170.3 - 168.3 Ma)

Environment/lithology: marine; lithology not reported

Size classes: macrofossils, mesofossils, microfossils

Preservation: cast, mold/impression

Collected by I.C. Russell in 1888

Primary reference: T. P. Poulton. 1979. Jurassic Trigoniid Bivalves from Canada and Western United States of America. Geological Survey of Canada Bulletin 282 [G. Stanley/H. Shepherd/H. Shepherd]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 139295: authorized by George Stanley, entered by Hannah Shepherd on 10.02.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

 Trigoniida - Myophorelloidae
Orthotrigonia ? sp. Cox 1952 clam
Myophorella aff. dawsoni Whiteaves 1878 clam