UNSM Sh-109: Early/Lower Hemingfordian, Nebraska
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Mammalia
- Proscalopidae
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Mesoscalops scopelotemos
Reed 1960
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Mammalia
- Rodentia
- Heteromyidae
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Schizodontomys amnicolus
Korth et al. 1990
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Harrymys magnus
(Wood 1932)
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Proheteromys sp.
Wood 1932
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Mammalia
- Rodentia
- Mylagaulidae
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Mesogaulus paniensis
(Matthew 1902)
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Mammalia
- Lagomorpha
- Ochotonidae
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Oreolagus nebrascensis
McGrew 1941
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Mammalia
- Lagomorpha
- Leporidae
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Archaeolagus sp.
Dice 1917
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| see common names | |||||||
Geography
| Country: | United States | State/province: | Nebraska | County: | Sheridan |
| Coordinates: | 42.7° North, 102.1° West (view map) | ||||
| Paleocoordinates: | 43.4° North, 98.2° West | ||||
| Basis of coordinate: | estimated from map | ||||
| Geographic resolution: | outcrop |
Time
| Period: | Neogene | Epoch: | Miocene |
| Stage: | Burdigalian | 10 m.y. bin: | Cenozoic 5 |
| Key time interval: | Early/Lower Hemingfordian | ||
| Age range of interval: | 18.50000 - 16.30000 m.y. ago |
Stratigraphy
| Formation: | Runningwater | ||||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: "early Hemingfordian"; "mid." part of formation | |||||
Lithology and environment
| Primary lithology: | sandstone |
| Secondary lithology: | conglomerate |
| Lithology description: "Fluvial lithofacies... predominantly epiclastic sand and gravel" | |
| Environment: | fluvial indet. |
| Geology comments: "deposited by a large meandering river" | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | mesofossils |
Collection methods and comments
| Collection methods: | bulk,sieve,field collection,survey of museum collection |
| Reason for describing collection: | biostratigraphic analysis |
| Museum repositories: | UNSM |
| Collection method comments: "Most of the local faunas listed are the result of test-screening sand and gravel lenses and sorting between 45 and 136 kg of concentrate" (apparently at each site) | |
Metadata
| Also known as: | Eastern Runningwater Fauna | ||
| Database number: | 69915 | ||
| Authorizer: | J. Alroy | Enterer: | J. Alroy |
| Modifier: | J. Alroy | Research group: | vertebrate |
| Created: | 2007-03-09 21:11:29 | Last modified: | 2007-03-09 23:39:44 |
| Access level: | the public | Released: | 2007-03-09 21:11:29 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 19303. | B. E. Bailey. 2004. Biostratigraphy and biochronology of early Arikareean through late Hemingfordian small mammal faunas from the Nebraska Panhandle and adjacent areas. Paludicola 4(3):81-113 [J. Alroy/J. Alroy] |