USGS 13722 - Tamaulipas, Mexico (Carrizo Sand): Middle Eocene, Mexico
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Gastropoda
- Rostellariidae
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Calyptraphorus carrizensis
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| see common names | |||||||
Geography
| Country: | Mexico | State/province: | Tamaulipas |
| Coordinates: | 26.4° North, 99.2° West (view map) | ||
| Paleocoordinates: | 28.4° North, 89.6° West | ||
| 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: | 47.80000 - 37.71000 m.y. ago |
Stratigraphy
| Geological group: | Claiborne | Formation: | Carrizo Sand | ||
| Local section: | Arroyo del Huizachal | ||||
| 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 Carrizo Sand, is the lowest formation of the Claiborne Group and has a thickness between 800 and 900 ft. | |||||
Lithology and environment
| Primary lithology: | brown,yellow calcareous sandstone |
| Includes fossils? | Y |
| Lithology description: Lenticular yellowish-brown crystalline sandstone with a calcareous cement. | |
| Environment: | marine indet. |
| Geology comments: Siliciclastic, estuarine or 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 13722 | ||
| Database number: | 42962 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2004-08-07 16:59:19 | Last modified: | 2013-11-25 13:37:23 |
| Access level: | the public | Released: | 2004-08-07 16:59:19 |
| Creative Commons license: | CC BY | ||
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] |