Where: Alaska (59.0° N, 153.8° W: paleocoordinates 35.6° N, 90.4° W)

• coordinate based on nearby landmark

When: Upper Naknek Formation, Oxfordian to Oxfordian (163.5 - 152.1 Ma)

Environment/lithology: marine; lithology not reported

Size classes: macrofossils, mesofossils

Collected by T.W. Stanton, G.C. Martin, L. Martin in 1904; reposited in the USNM

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 139476: authorized by George Stanley, entered by Hannah Shepherd on 12.02.2013

Creative Commons license: CC BY (attribution)