Where: Caribou County, Idaho (42.9° N, 111.2° W: paleocoordinates 34.8° N, 51.3° W)

• coordinate estimated from map

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

• About 110ft below top of member, in yellow-gray, sandy shaly limestone about 8ft above a 6ft unit of white-weathering limestone.

Environment/lithology: marine; gray, yellow, argillaceous, sandy limestone

Size class: macrofossils

Collected by R.W. Imlay and John McIntyre in 1949; 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 167053: authorized by Steven Holland, entered by Pedro Monarrez on 06.03.2015

Creative Commons license: CC BY (attribution)