USGS Field Number 56-120 (Jurassic of the United States)

Where: Grant County, Oregon (44.0° N, 119.6° W: paleocoordinates 34.9° N, 59.9° W)

• coordinate based on nearby landmark

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

• Middle Bajocian, near middle of Weberg Formation

Environment/lithology: marine; lithology not reported

Size classes: macrofossils, mesofossils

Collected by J.H. Beeson, W.R. Dickinson, S.W. Muller, L.W. Vigrass in 1956; 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 139739: authorized by George Stanley, entered by Hannah Shepherd on 16.02.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Trigoniida - Myophorelloidae
Myophorella cf. argo Crickmay 1930 clam
Hypotype USNM 219885