Asher Section (30 ft.): early Late Arikareean, Oregon
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia
- Rodentia
- Entoptychidae
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Entoptychus individens
Rensberger 1971
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see common names |
Geography
Country: | United States | State/province: | Oregon | County: | Wheeler |
Coordinates: | 44.8° North, 119.7° West (view map) | ||||
Paleocoordinates: | 44.5° North, 110.8° West | ||||
Basis of coordinate: | stated in text | ||||
Geographic resolution: | outcrop |
Time
10 m.y. bin: | Cenozoic 4-5 |
Key time interval: | early Late Arikareean |
Age range of interval: | 29.50000 - 18.50000 m.y. ago |
Stratigraphy
Formation: | John Day | Member: | Haystack Valley |
Regional section: | JohnD | Regional bed: | 8 |
Regional order: | bottom to top | ||
Stratigraphic resolution: | group of beds |
Lithology and environment
Primary lithology: | tuffaceous,gray,green claystone |
Secondary lithology: | tuffaceous,gray,green siltstone |
Lithology description: gray-green tuffaceous claystone and siltstone | |
Environment: | terrestrial indet. |
Taphonomy
Modes of preservation: | body |
Size of fossils: | macrofossils |
Collection methods and comments
Collection methods: | field collection |
Reason for describing collection: | biostratigraphic analysis |
Museum repositories: | UNSM |
Metadata
Also known as: | Haystack Valley Member | ||
Database number: | 36853 | ||
Authorizer: | J. Alroy, J. Marcot | Enterer: | J. Alroy, J. Marcot |
Modifier: | J. Alroy | Research group: | vertebrate |
Subset of collection #: | 17925 | ||
Created: | 2004-02-17 14:07:53 | Last modified: | 2004-02-17 16:13:09 |
Access level: | the public | Released: | 2004-02-17 14:07:53 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
9853. | R. M. Hunt, Jr. and E. Stepleton. 2004. Geology and paleontology of the upper John Day beds, John Day river valley, Oregon: lithostratigraphic and biochronologic revision in the Haystack Valley and Kimberly areas (Kimberly and Mt. Misery quadrangles). Bulletin of the American Museum of Natural History 282:1-90 [J. Alroy/J. Alroy/J. Alroy] |