Where: Summit County, Utah (40.8° N, 111.2° W: paleocoordinates 32.7° N, 51.8° W)

• coordinate estimated from map

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

• about 11ft. above thin bed of green tuff at top of Gypsum Spring Member

Environment/lithology: marine; limestone

Size class: macrofossils

Collected by 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 167118: authorized by Steven Holland, entered by Pedro Monarrez on 07.03.2015

Creative Commons license: CC BY (attribution)