The Pass Peak Formation is a
Wasatchian
The Wasatchian North American Stage on the geologic timescale is the North American faunal stage according to the North American Land Mammal Ages chronology (NALMA), typically set from 55,400,000 to 50,300,000 years BP lasting .
It is usually c ...
geologic formation
A geological formation, or simply formation, is a body of rock having a consistent set of physical characteristics ( lithology) that distinguishes it from adjacent bodies of rock, and which occupies a particular position in the layers of rock exp ...
in
Wyoming
Wyoming () is a state in the Mountain West subregion of the Western United States. It is bordered by Montana to the north and northwest, South Dakota and Nebraska to the east, Idaho to the west, Utah to the southwest, and Colorado to the sou ...
. It preserves
fossils
A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved ...
dating back to the
Ypresian
In the geologic timescale the Ypresian is the oldest age or lowest stratigraphic stage of the Eocene. It spans the time between , is preceded by the Thanetian Age (part of the Paleocene) and is followed by the Eocene Lutetian Age. The Ypresian i ...
stage of the
Eocene
The Eocene ( ) Epoch is a geological epoch that lasted from about 56 to 33.9 million years ago (mya). It is the second epoch of the Paleogene Period in the modern Cenozoic Era. The name ''Eocene'' comes from the Ancient Greek (''ēṓs'', " ...
period.
[Pass Peak Formation]
at Fossilworks
Fossilworks is a portal which provides query, download, and analysis tools to facilitate access to the Paleobiology Database, a large relational database assembled by hundreds of paleontologists from around the world.
History
Fossilworks was cre ...
.org
Fossil content
The following fossils have been found in the formation:
[Dorr Jr., 1978]
Mammals
;Artiodactyls
* '' Diacodexis sp.''
;Erinaceomorpha
* '' Diacodon celatus''
;Glires
* '' Paramys copei''
;Macroscelidea
* Adapisoricidae indet.
;Perissodactyla
* '' Hyracotherium cf. vasacciense''
;Placentalia
* '' Hyopsodus cf. wortmani''
Wasatchian correlations
See also
* List of fossiliferous stratigraphic units in Wyoming
This article contains a list of fossil-bearing stratigraphic units in the state of Wyoming, U.S.
Sites
See also
* Paleontology in Wyoming
References
*
{{DEFAULTSORT:Fossiliferous stratigraphic units in Wyoming
Wyoming
Wyoming ...
* Paleontology in Wyoming
Paleontology in Wyoming includes research into the prehistoric life of the U.S. state of Wyoming as well as investigations conducted by Wyomingite researchers and institutions into ancient life occurring elsewhere. The fossil record of the US stat ...
References
Bibliography
* {{cite LSA , last=Dorr, Jr , first=J. A , year=1978 , title=Revised and Amended Fossil Vertebrate Faunal Lists, Early Tertiary, Hoback Basin, Wyoming , journal= Contributions to Geology, University of Wyoming , volume=16 , pages=79–84
Geologic formations of Wyoming
Eocene Series of North America
Paleogene geology of Wyoming
Ypresian Stage
Wasatchian
Paleontology in Wyoming