Where: Shasta County, California (41.0° N, 122.0° W: paleocoordinates 34.6° N, 61.3° W)

• coordinate based on nearby landmark

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

• Probably Middle Bajocian

Environment/lithology: marine; sandstone

Size classes: macrofossils, mesofossils, microfossils

Preservation: cast, mold/impression

Collected by T. P. Poulton in 1972

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 139220: authorized by George Stanley, entered by Hannah Shepherd on 09.02.2013

Creative Commons license: CC BY (attribution)