USGS 17261, southwest of Troy: Early/Lower Maastrichtian, Mississippi
collected by L.W. Stephenson
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Echinoidea
- Spatangoida
- Hemiasteridae
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Hemiaster wetherbyi
de Loriol 1887
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| see common names | |||||||
Geography
| Country: | United States | State/province: | Mississippi | County: | Pontotoc |
| Coordinates: | 34.1° North, 88.9° West (view map) | ||||
| Paleocoordinates: | 37.7° North, 66.4° West | ||||
| Basis of coordinate: | based on nearby landmark | ||||
| Geographic resolution: | outcrop |
Time
| Period: | Cretaceous | Epoch: | Late/Upper Cretaceous |
| Stage: | Maastrichtian | 10 m.y. bin: | Cretaceous 8 |
| Key time interval: | Early/Lower Maastrichtian | ||
| Age range of interval: | 72.10000 - 66.00000 m.y. ago |
Stratigraphy
| Formation: | Ripley |
| Stratigraphic resolution: | group of beds |
Lithology and environment
| Primary lithology: | "siliciclastic" |
| Environment: | marine indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Reason for describing collection: | taxonomic analysis |
| Museum repositories: | USNM |
| Collectors: | L.W. Stephenson |
Metadata
| Database number: | 197615 | ||
| Authorizer: | M. Clapham | Enterer: | M. Clapham | Research group: | marine invertebrate |
| Created: | 2018-11-17 22:15:39 | Last modified: | 2018-11-17 22:15:39 |
| Access level: | the public | Released: | 2018-11-17 22:15:39 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 26335. | 1% 20600 | C. W. Cooke. 1953. American Upper Cretaceous Echinoidea. United States Geological Survey Professional Paper 254-A:1-44 [W. Kiessling/U. Merkel/M. Clapham] |