low buttes, northeast of Twin Buttes: Middle Eocene, Wyoming
collected by C. L. Gazin, F. L. Pearce & G. F. Sternberg 1946-1947
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Reptilia
- Anguidae
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cf. Glyptosaurus sylvestris
Marsh 1871
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Sullivan 1979 | 1 specimen | ||||||||
| USNM 16654, partial skeleton | ||||||||||
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Reptilia
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Aves indet.
Linnaeus 1758
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1 specimen | |||||||||
| USNM 244323 | ||||||||||
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Juncitarsus gracillimus n. gen., n. sp.
Olson and Feduccia 1980
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19 specimens | |||||||||
| USNM 244318-22, 244324-38 | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Wyoming | County: | Sweetwater |
| Coordinates: | 41.2° North, 109.7° West (view map) | ||||
| Paleocoordinates: | 44.0° North, 98.5° West | ||||
| Basis of coordinate: | stated in text | ||||
| Geographic resolution: | local area |
Time
| Period: | Paleogene | Epoch: | Eocene |
| 10 m.y. bin: | Cenozoic 2-3 | ||
| Key time interval: | Middle Eocene | ||
| Age range of interval: | 47.80000 - 37.71000 m.y. ago |
Stratigraphy
| Formation: | Bridger | ||||
| Stratigraphic resolution: | formation | ||||
| Stratigraphy comments: very low in formation; earliest middle Eocene | |||||
Lithology and environment
| Primary lithology: | yellow "siliciclastic" | ||
| Secondary lithology: | gray,green lithified sandstone | ||
| Includes fossils? | Y | ||
| Includes fossils? | Y | ||
| Lithology description: "yellow layer near base of buttes, beneath a hard grayish green sandstone" | |||
| Environment: | terrestrial indet. | Tectonic setting: | rift |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
| Preservation of anatomical detail: | good |
| Abundance in sediment: | rare |
| Fragmentation: | occasional |
Collection methods and comments
| Collection methods: | survey of museum collection | ||
| Reason for describing collection: | general faunal/floral analysis | ||
| Museum repositories: | USNM | ||
| Collectors: | C. L. Gazin, F. L. Pearce & G. F. Sternberg | Collection dates: | 1946-1947 |
Metadata
| Also known as: | Juncitarsus type | ||
| Database number: | 97759 | ||
| Authorizer: | M. Carrano, P. Barrett | Enterer: | H. Street, M. Carrano, T. Cleary |
| Modifier: | M. Carrano | Research group: | vertebrate |
| Created: | 2010-08-27 13:11:33 | Last modified: | 2010-09-16 15:40:40 |
| Access level: | the public | Released: | 2010-08-27 13:11:33 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 33895. | ETE | S. L. Olson and A. Feduccia. 1980. Relationships and evolution of flamingos (Aves: Phoenicopteridae). Smithsonian Contributions to Zoology 316:1-73 [M. Carrano/M. Carrano] |
Secondary references:
| 33413 | B. P. Kear. 2006. Plesiosaur remains from Cretaceous high-latitude non-marine deposits in southeastern Australia. Journal of Vertebrate Paleontology 26(1):196-199 [M. Carrano/H. Street] | |
| 60385 | R. M. Sullivan. 1979. Revision of the Paleogene genus Glyptosaurus (Reptilia, Anguidae). Bulletin of the American Museum of Natural History 163(1):1-72 [P. Barrett/T. Cleary] |