Alazán Sample 55: Early/Lower Oligocene, Mexico
collected by J. Álvarez
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Ostracoda
- Podocopida
- Cytherideidae
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Clithrocytheridea grigsbyi
(Howe and Chambers 1935)
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original and current combination Cytheridea grigsbyi | ||||||||||
var. vicksburgensis | ||||||||||
Ostracoda
- Podocopida
- Trachyleberididae
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Ambocythere aff. elongata
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Ostracoda
- Podocopida
- Pontocyprididae
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Argilloecia hiwanneensis
Howe and Law 1936
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see common names |
Geography
Country: | Mexico | State/province: | Veracruz |
Coordinates: | 21.1° North, 97.6° West (view map) | ||
Paleocoordinates: | 21.8° North, 91.8° West | ||
Basis of coordinate: | based on nearby landmark | ||
Geographic resolution: | small collection |
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 - 28.40000 m.y. ago |
Stratigraphy
Formation: | Alazán | ||||
Stratigraphic resolution: | bed | ||||
Stratigraphy comments: the ostracods "show a distinct affinity to those present in the Red Bluff Formation, basal Oligocene of Mississippi" |
Lithology and environment
Primary lithology: | not reported |
Environment: | marine indet. |
Taphonomy
Modes of preservation: | body |
Size of fossils: | microfossils |
Collection methods and comments
Collection methods: | survey of museum collection |
Reason for describing collection: | general faunal/floral analysis |
Collectors: | J. Álvarez |
Collection method comments: Lousiana State University collection |
Metadata
Database number: | 94168 | ||
Authorizer: | J. Alroy | Enterer: | J. Alroy | Research group: | micropaleontology |
Created: | 2010-02-10 11:38:56 | Last modified: | 2010-02-10 13:38:56 |
Access level: | the public | Released: | 2010-02-10 11:38:56 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
32000. | L. A. Laurencich. 1969. Some Ostracoda from the Alazán Formation, Mexico. Micropaleontology 15(4):493-503 [J. Alroy/J. Alroy] |