Where: Bonneville County, Idaho (43.2° N, 111.1° W: paleocoordinates 36.5° N, 52.7° W)

• coordinate estimated from map

When: Leeds Creek Member (Twin Creek Limestone Formation), Callovian (166.1 - 163.5 Ma)

Environment/lithology: marine; limestone

Size class: macrofossils

Collected by L. S. Gardner in 1939; 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 167280: authorized by Steven Holland, entered by Pedro Monarrez on 10.03.2015

Creative Commons license: CC BY (attribution)