USGS 14056 - Nuevo Leon, Mexico (Lower Marine Sandstone, Oligocene): Early/Lower Oligocene, Mexico
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Bivalvia
- Ostreida
- Pteriidae
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Pteria sp.
Scopoli 1777
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Bivalvia
- Carditida
- Carditidae
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Venericardia cf. carsonensis
Dall 1903
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recombined as Venericardia (Rotundicardia) carsonensis | |||||||
Bivalvia
- Pholadida
- Corbulidae
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Corbula (Caryocorbula) engonata
Conrad 1848
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Bivalvia
- Cardiida
- Cardiidae
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Cerastoderma (Dinocardium) bakeri
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original and current combination Dinocardium | |||||||
Nemocardium ? diversum
(Conrad 1848)
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recombined as Nemocardium (Nemocardium) diversum | |||||||
Gastropoda
- Naticidae
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Sinum mississippiense
Conrad 1848
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Gastropoda
- Ficidae
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Ficus mississippiensis
Conrad 1848
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Gastropoda
- Neogastropoda
- Conidae
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Conus (Leptoconus) ? protractus
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see common names |
Geography
Country: | Mexico | State/province: | Nuevo Leon |
Coordinates: | 25.8° North, 99.2° West (view map) | ||
Paleocoordinates: | 26.6° North, 93.1° West | ||
Basis of coordinate: | based on nearby landmark | ||
Geographic resolution: | outcrop |
Time
Period: | Paleogene | Epoch: | Oligocene |
Stage: | Rupelian | 10 m.y. bin: | Cenozoic 4 |
Key time interval: | Early/Lower Oligocene | ||
Age range of interval: | 33.90000 - 27.82000 m.y. ago |
Stratigraphy
Member: | Lower marine sandstone | ||||
Stratigraphic resolution: | bed | ||||
Stratigraphy comments: Lower Oligocene age faunas in notheastern Mexico are closely allied to the Chickasawhay and Suwanee limestones of the eastern Gulf Coast. They are recognised in a lower marine sandstone, presumably of lower Oligocene age, and in an upper marine sandstone, presumably of middle Oligocene age. The marine beds are separated by non-maine sediments, typically red and green bentonitic clays. The Oligocene series in Mexico is measured in thousands of feet, although the fauna is only known from a few isolated outcrops. |
Lithology and environment
Primary lithology: | medium,concretionary,brown,gray lithified conglomeratic,calcareous sandstone |
Includes fossils? | Y |
Lithology description: Brownish tan or gray, medium-grained, locally conglomeratic, calcareous concretionary sandstone. | |
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 14056 | ||
Database number: | 43077 | ||
Authorizer: | A. Hendy | Enterer: | A. Hendy |
Modifier: | A. Hendy | Research group: | marine invertebrate |
Created: | 2004-08-10 09:25:17 | Last modified: | 2013-11-25 13:37:23 |
Access level: | the public | Released: | 2004-08-10 09:25:17 |
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] |