Gering B: Arikareean, Nebraska
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Mammalia
- Entelodontidae
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Archaeotherium sp.
Leidy 1850
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Mammalia
- Agriochoeridae
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Agriochoerus sp.
Leidy 1850
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Mammalia
- Tayassuidae
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Chaenohyus sp.
Cope 1879
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= Thinohyus sp.
Marsh 1875
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Alroy 2002 | |||||||||
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Mammalia
- Merycoidodontidae
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Mesoreodon sp.
Scott 1893
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= Merycoidodontidae indet.
Cook 1912
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Alroy 2002 | |||||||||
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Sespia sp.
(Stock 1930)
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| original and current combination Leptauchenia (Sespia) | ||||||||||
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Cyclopidius shanafeltae
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| synonym of Leptauchenia | ||||||||||
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Mammalia
- Carnivora
- Canidae
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Enhydrocyon sp.
Cope 1879
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| "A" | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Nebraska | County: | Morrill |
| Coordinates: | 41.7° North, 103.1° West (view map) | ||||
| Paleocoordinates: | 42.6° North, 97.3° West | ||||
| Basis of coordinate: | based on political unit |
Time
| 10 m.y. bin: | Cenozoic 4-5 | ||
| *Period: | Tertiary | *Epoch: | Oligocene |
| Key time interval: | Arikareean | ||
| Age range of interval: | 29.50000 - 18.50000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Local section: | NPlat | Local bed: | 6 |
| Local order: | bottom to top |
Lithology and environment
| Environment: | terrestrial indet. |
Taphonomy
| Modes of preservation: | body |
Collection methods and comments
| Taxonomic list comments:some specimens probably from Banner Co. this unit appears to include the Twin Sister's Pumice Conglomerate of Mason and Swisher 1989, dated at 27.7 +/- 0.6 Ma (KA on sanidine) and redated by Tedford et al. 1996 at 28.31 +/- 0.03 Ma (SCLF AA); additional AA dates of 28.26 +/- 0.05 Ma (Chimney Rock Perrierite Ash) and 28.07 +/- 0.07 Ma (Roundhouse Rock Pisolitic Ash) appear to be from base of C and "near the top" of B and are barely distinguishable; 28.31 appears to be the best and should be used in calibration |
Metadata
| Database number: | 17514 | ||
| Authorizer: | J. Alroy | Enterer: | J. Alroy | Research group: | vertebrate |
| Created: | 1994-04-30 00:00:00 | Last modified: | 2002-06-03 03:27:42 |
| Access level: | the public | Released: | 1994-04-30 00:00:00 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 3345. | C. C. Swisher. 1982. Stratigraphy and biostratigraphy of the eastern portion of the Wildcat Ridge, western Nebraska. 1-172 [J. Alroy/J. Alroy/J. Marcot] |
Secondary references:
| 6294 | J. Alroy. 2002. Synonymies and reidentifications of North American fossil mammals. [J. Alroy/J. Alroy/M. Kouvari] |