USGS Mesozoic loc. 28372 (Jurassic of the United States)

Where: Grant County, Oregon (44.1° N, 119.3° W: paleocoordinates 28.4° N, 56.0° W)

• coordinate based on nearby landmark

When: Suplee Formation, Late/Upper Pliensbachian (189.6 - 183.0 Ma)

• Upper Pliensbachian, 4.5 to 7.5 m (15-25 ft) below top of Suplee Formation (Imlay, 1968)

Environment/lithology: marine; gray limestone and calcareous sandstone

• The Suplee Formation of Lupher (1941) consists of gray granular limestone and calcareous sandstone, weathers light brown, ranges from 30 to 150 feet in thickness.

Size classes: macrofossils, mesofossils

Collected by R.W. Imlay in 1961; 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 139736: authorized by George Stanley, entered by Hannah Shepherd on 16.02.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

 Trigoniida - Myophorelloidae
Vaugonia oregonensis Poulton 1979 clam