San Sebastián-Isabela Section Sample 46: Early/Lower Oligocene, Puerto Rico
collected by W. A. Gordon
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Ostracoda
- Podocopida
- Hemicytheridae
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Jugosocythereis spinosa n. sp.
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Aurila socra
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Ostracoda
- Podocopida
- Loxoconchidae
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Loxoconcha durhami
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Ostracoda
- Podocopida
- Cytherideidae
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Haplocytheridea trepta
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Haplocytheridea aff. hazzardi
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Haplocytheridea sp.
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Ostracoda
- Podocopida
- Bythocyprididae
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? Bythocypris gibsonensis
Howe and Chambers 1935
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Ostracoda
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Puriana elongorugata
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| see common names | |||||||
Geography
| Country: | Puerto Rico |
| Coordinates: | 18.3° North, 67.0° West (view map) |
| Paleocoordinates: | 17.3° North, 66.3° West |
| Basis of coordinate: | estimated from map |
| Geographic resolution: | hand sample |
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
| Formation: | San Sebastián | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: correlates with the Vicksburg Group (i.e., early Oligocene) | |||||
Lithology and environment
| Primary lithology: | gray claystone |
| Lithology description: "Dark grey clay" | |
| Environment: | marine indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | microfossils |
Collection methods and comments
| Collection methods: | bulk,chemical,sieve,survey of museum collection |
| Reason for describing collection: | taxonomic analysis |
| Collectors: | W. A. Gordon |
| Collection method comments: Lousiana State University collection
samples consist of "washed residues" that I assume were chemically treated because most come from presumably lithified marls and limestones | |
Metadata
| Database number: | 94188 | ||
| Authorizer: | J. Alroy | Enterer: | J. Alroy |
| Modifier: | J. Alroy | Research group: | vertebrate |
| Created: | 2010-02-10 16:41:47 | Last modified: | 2010-02-10 19:21:53 |
| Access level: | the public | Released: | 2010-02-10 16:41:47 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 32004. | W. A. van den Bold. 1965. Middle Tertiary Ostracoda from northwestern Puerto Rico. Micropaleontology 11(4):381-414 [J. Alroy/J. Alroy] |