Pass Creek Oreodon Zone: Orellan, South Dakota
collected 1932
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Mammalia
- Perissodactyla
- Equidae
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Mesohippus sp.
Marsh 1875
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= Equidae indet.
Gray 1821
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Alroy 2007 | |||||||||
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Mammalia
- Perissodactyla
- Rhinocerotidae
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Rhinocerotidae indet.
Gray 1821
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Mammalia
- Rodentia
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Rodentia indet.
Bowdich 1821
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| "mouselike | ||||||||||
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Reptilia
- Accipitriformes
- Accipitridae
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Buteo grangeri n. sp.
Wetmore and Case 1934
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Actinopteri
- Siluriformes
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Siluriformes indet.
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| "catfish" | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | South Dakota | County: | Jackson |
| Coordinates: | 43.8° North, 101.5° West (view map) | ||||
| Paleocoordinates: | 44.8° North, 93.2° West | ||||
| Basis of coordinate: | based on nearby landmark | ||||
| Geographic resolution: | small collection |
Time
| Period: | Paleogene | Epoch: | Oligocene |
| Stage: | Rupelian | 10 m.y. bin: | Cenozoic 4 |
| Key time interval: | Orellan | ||
| Age range of interval: | 33.90000 - 31.80000 m.y. ago |
Stratigraphy
| Formation: | Brule | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: "the Oreodon zone of the Oligocene beds" | |||||
Lithology and environment
| Primary lithology: | poorly lithified sandstone |
| Lithology description: from a "patch" of "more or less indurated clayey sand" within an interval dominated by "clay" | |
| Environment: | fluvial indet. |
| Geology comments: "some site in a watercourse" | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
| Spatial resolution: | allochthonous |
Collection methods and comments
| Collection methods: | selective quarrying,surface (in situ),field collection |
| Reason for describing collection: | taxonomic analysis |
| Museum repositories: | UMMP | Collection dates: | summer of 1932 |
| Collection method comments: the "bones of a rhinoceros" were exposed and the other specimens were quarried | |
Metadata
| Database number: | 76168 | ||
| Authorizer: | J. Alroy | Enterer: | J. Alroy |
| Modifier: | J. Alroy | Research group: | vertebrate |
| Created: | 2007-11-14 17:34:39 | Last modified: | 2007-11-14 19:38:50 |
| Access level: | the public | Released: | 2007-11-14 17:34:39 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 25818. | A. Wetmore and E. C. Case. 1934. A new fossil hawk from the Oligocene beds of South Dakota. Contributions from the Museum of Paleontology, University of Michigan 4(8):129-132 [J. Alroy/J. Alroy] |
Secondary references:
| 19636 | J. Alroy. 2007. Synonymies and reidentifications of North American fossil vertebrates and so forth. [J. Alroy/J. Alroy] |