Where: Bonneville County, Idaho (43.4° N, 111.8° W: paleocoordinates 35.4° N, 51.7° W)

• coordinate estimated from map

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

• From nodular gray limestone directly above soft papery claystone and 20-25ft below top of member.

Environment/lithology: marine; nodular, gray limestone

Size class: macrofossils

Collected by R. W. Imlay in 1962; 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 167039: authorized by Steven Holland, entered by Pedro Monarrez on 06.03.2015

Creative Commons license: CC BY (attribution)