Where: Duchesne County, Utah (40.4° N, 110.8° W: paleocoordinates 33.0° N, 52.3° W)

• coordinate estimated from map

When: Watton Canyon Member (Twin Creek Limestone Formation), Bathonian (168.3 - 166.1 Ma)

• 3 ft above base.

Environment/lithology: marine; 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 167257: authorized by Steven Holland, entered by Pedro Monarrez on 09.03.2015

Creative Commons license: CC BY (attribution)