Where: San Pete County, Utah (39.1° N, 111.7° W: paleocoordinates 32.9° N, 54.6° W)
• coordinate estimated from map
When: Twelvemile Canyon Member (Arapien Shale Formation), Late/Upper Bathonian to Late/Upper Bathonian (167.7 - 161.2 Ma)
• From upper part of member, 600(?) ft below base of Twist Gulch Formation.
Environment/lithology: marine; calcareous shale and siltstone
Size class: macrofossils
Collected by C. A. Reutinger in 1947; reposited in the USNM
Primary reference: R. W. Imlay. 1964. Marine Jurassic Pelecypods From Central and Southern Utah. United States Geological Survey Professional Paper 483-C:C1-C42 [S. Holland/P. Monarrez]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 169137: authorized by Steven Holland, entered by Pedro Monarrez on 08.05.2015
Creative Commons license: CC BY (attribution)
Taxonomic list
Bivalvia | |
? Quenstedtia sp. Morris 1854 clam |