USGS 13631 - Nuevo Leon, Mexico (Mount Selman Formation): Middle Eocene, Mexico
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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unclassified
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Tubulostium cortezi
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| see common names | |||||||
Geography
| Country: | Mexico | State/province: | Nuevo Leon |
| Coordinates: | 25.7° North, 99.2° West (view map) | ||
| Paleocoordinates: | 27.7° North, 89.8° 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: | Mount Selman | ||
| Local section: | Rancho Presa Nuevo | ||||
| Regional section: | Nuevo Leon | ||||
| 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 formation is correlated to the Lisborn Formation of the Gulf Coast. The scattered outcrops are mostly barren. | |||||
Lithology and environment
| Primary lithology: | sandstone |
| Secondary lithology: | "shale" |
| Includes fossils? | Y |
| Lithology description: Mostly shales and sandstones. | |
| Environment: | marine indet. |
| Geology comments: Siliciclastic. 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 13631 | ||
| Database number: | 42963 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2004-08-07 19:06:33 | Last modified: | 2013-11-25 13:37:23 |
| Access level: | the public | Released: | 2004-08-07 19:06:33 |
| 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] |