Where: Utah County, Utah (40.0° N, 111.5° W: paleocoordinates 33.4° N, 53.8° 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 E. M. Spieker and J. B. Reeside, Jr. in 1935; 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 167327: authorized by Steven Holland, entered by Pedro Monarrez on 11.03.2015

Creative Commons license: CC BY (attribution)