USGS 13288 - Tamaulipas, Mexico (Mount Selman Formation): Middle Eocene, Mexico
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Gastropoda
- Cerithiidae
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Gastropoda
- Neogastropoda
- Melongenidae
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| see common names | |||||||
Geography
| Country: | Mexico | State/province: | Tamaulipas |
| Coordinates: | 26.8° North, 99.3° West (view map) | ||
| Paleocoordinates: | 32.5° North, 82.1° West (Wright 2013) | ||
| Basis of coordinate: | based on nearby landmark | ||
| Geographic resolution: | outcrop |
Time
| Period: | Paleogene | Epoch: | Eocene |
| 10 m.y. bin: | Cenozoic 2-3 | ||
| Key time interval: | Middle Eocene | ||
| Age range of interval: | 48.07 - 37.71 m.y. ago |
Stratigraphy
| Geological group: | Claiborne | Formation: | Mount Selman | ||
| Local section: | Rio Salado | ||||
| Regional section: | Tamaulipas | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: The succession of Claiborne Group in northeastern Mexico is exceptionally thick and well correlated to those units of the same name in Texas on the basis of faunal similarity. The Mount Selman Formation includes of 2,500 ft of sediments, mostly shales and sandstones. The scattered outcrops are mostly barren. The formation is correlated to the Lisborn Formation of the Gulf Coast. The collection is derived from about 5 ft of highly fossiliferous calcareous sandstone, overlain by 20 ft of bedded sands and sandy clays in which no fossils were observed, and underlain by bedded clayey sands. | |||||
Lithology and environment
| Primary lithology: | shelly/skeletal calcareous sandstone |
| Includes fossils? | Y |
| Lithology description: Highly fossiliferous, calcareous sandstone | |
| Environment: | coastal indet. |
| Geology comments: Siliciclastic, probably very shallow water. No paleoenvironmental data reported. | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | selective quarrying,field collection |
| Reason for describing collection: | taxonomic analysis |
| Museum repositories: | USNM |
| Collection method comments: Collections reposited in USGS and USNM collections. | |
| Taxonomic list comments:Exhaustive for mollusca. | |
Metadata
| Also known as: | USGS 13288 | ||
| Database number: | 42970 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2004-08-07 19:17:58 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2004-08-07 19:17:58 |
| Creative Commons license: | CC0 | ||
Reference information
Primary reference:
| 7474. | J. Gardner. 1945. Mollusca of the Tertiary formations of Northeastern Mexico. Geological Society of American Memoir 11 [M. Kosnik/M. Kosnik/M. Kosnik] |