Where: Lincoln County, Wyoming (42.9° N, 110.5° W: paleocoordinates 34.8° N, 50.7° W)

• coordinate estimated from map

When: Sliderock Member (Twin Creek Limestone Formation), Bajocian (170.3 - 168.3 Ma)

• 15-20ft above red siltstone

Environment/lithology: marine; limestone

Size class: macrofossils

Collected by W. W. Rubey and J. S. Willliams in 1931; reposited in the USNM

Primary reference: R. W. Imlay. 1967. Twin Creek Limestone (Jurassic) in the Western Interior of the United States. United States Geological Survey Professional Paper 540:1-105 [S. Holland/P. Monarrez]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 167064: authorized by Steven Holland, entered by Pedro Monarrez on 06.03.2015

Creative Commons license: CC BY (attribution)