Where: Bonneville County, Idaho (43.4° N, 111.8° W: paleocoordinates 35.1° N, 51.3° W)

• coordinate estimated from map

When: Rich Member (Twin Creek Limestone Formation), Late/Upper Bajocian (171.6 - 167.7 Ma)

• Near middle of member and about 170-190ft above base of member.

Environment/lithology: marine; nodular limestone

Size class: macrofossils

Collected by R. W. Imlay and Yaacov Nir in 1961; 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 167164: authorized by Steven Holland, entered by Pedro Monarrez on 08.03.2015

Creative Commons license: CC BY (attribution)