Opal (UW 24-67) (Eocene of the United States)
Where: Lincoln County, Wyoming (41.8° N, 110.3° W: paleocoordinates 45.8° N, 96.5° W)
• coordinate based on nearby landmark
• small collection-level geographic resolution
When: Bridger Formation, Bridgerian (50.3 - 46.2 Ma)
• bed-level stratigraphic resolution
Environment/lithology: fluvial; tuff
• white tuff bed... typically varies between 3 to 8 feet in thickness... very fine-grained and highly altered and in places interbedded in the tuff are laminated siltstones
Reposited in the UW
Primary reference: P. O. McGrew and R. Sullivan. 1971. The stratigraphy and paleontology of Bridger A. Contributions to Geology, University of Wyoming 9(2):66-85 [J. Alroy/J. Alroy/J. Marcot]more details
PaleoDB collection 16376: authorized by John Alroy, entered by John Alroy on 21.09.1999
Creative Commons license: CC BY (attribution)
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