Opal (UW 1-67) (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 16355: authorized by John Alroy, entered by John Alroy on 21.09.1999
Creative Commons license: CC BY (attribution)
Taxonomic list
• the following records appear to be from the Opal area, but exact localities are unclear and all five species occur in the new UM collections of Gunnell 1998c: Anaptomorphus westi Gunnell 1995a: UW V-65003, 65004, 67034 Patriofelis ulta Gazin 1957: "20-25 miles east of Kemmerer, Wyo." Bathyopsis "middleswarti" Wheeler 1961: type Stylinodon mirus Schoch 1986 Palaeosyops fontinalis Osborn 1929: type, from Big Sandy Creek near the Green River
Show authors, comments, and common names
| Mammalia | |
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Trogosus latidens Marsh 1874 tillodont | |
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Orohippus pumilus Marsh 1871 horse | |
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"Scenopagus priscus" = Nyctitherium priscum
"Scenopagus priscus" = Nyctitherium priscum Marsh 1872 placental | |
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Sciuravus nitidus Marsh 1871 rodent | |
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Leptotomus parvus Wood 1959 rodent
Paramys cf. delicatus Leidy 1871 rodent | |
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Microsyops elegans Marsh 1871 primate | |