Wewela Microfauna: Monroecreekian, South Dakota
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Actinopteri
- Siluriformes
- Ictaluridae
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Ictalurus sp.
Rafinesque 1820
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Mammalia
- Rodentia
- Castoridae
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Palaeocastor sp.
Leidy 1869
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1 specimen | ||||||
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Mammalia
- Rodentia
- Cricetidae
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Paciculus sp.
Cope 1879
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2 specimens | ||||||
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Mammalia
- Rodentia
- Allomyidae
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Alwoodia sp.
Rensberger 1983
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3 specimens | ||||||
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Mammalia
- Lagomorpha
- Ochotonidae
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Gripholagomys lavocati
Green 1972
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11 specimens | ||||||
| see common names | |||||||
Geography
| Country: | United States | State/province: | South Dakota | County: | Tripp |
| Coordinates: | 43.1° North, 99.8° West (view map) | ||||
| Paleocoordinates: | 43.8° North, 93.9° West | ||||
| Basis of coordinate: | based on nearby landmark | ||||
| Altitude: | 2375 feet | ||||
| Geographic resolution: | small collection |
Time
| Period: | Paleogene | Epoch: | Oligocene |
| Stage: | Chattian | 10 m.y. bin: | Cenozoic 4 |
| Key time interval: | Monroecreekian | ||
| Age range of interval: | 24.70000 - 23.10000 m.y. ago |
Stratigraphy
| Geological group: | Arikaree | Formation: | Turtle Butte | ||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: "late early Arikareean" (= Monroecreekian) "upper third of the Turtle Butte Formation... lower Arikaree Group" | |||||
Lithology and environment
| Primary lithology: | pebbly unlithified sandy siltstone |
| Lithology description: "fluvial, 0.3-1 m lens of sandy siltstone with poorly sorted pebble intraclasts, deposited within characteristic tuffaceous siltstones" | |
| Environment: | fluvial indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | mesofossils |
| Articulated whole bodies: | none |
| Associated major elements: | none |
| Disassociated major elements: | some |
| Disassociated minor elements: | many |
Collection methods and comments
| Collection methods: | bulk,sieve,field collection |
| Minimum sieve size: | 1.600 |
| Collection size: | 17 specimens |
| Rock censused: | 14 kg |
| Reason for describing collection: | biostratigraphic analysis |
| Museum repositories: | UNSM |
| Collection method comments: rock censused includes "a small bag (14 kg) of sandy siltstone fragments" produced by dry screening, and not the original sediment | |
Metadata
| Also known as: | UNSM SDK-9 | ||
| Database number: | 67636 | ||
| Authorizer: | J. Alroy | Enterer: | J. Alroy |
| Modifier: | J. Alroy | Research group: | vertebrate |
| Created: | 2006-11-29 21:22:16 | Last modified: | 2006-11-29 23:22:42 |
| Access level: | the public | Released: | 2006-11-29 21:22:16 |
| 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] |