Road PR-111: Rupelian, Puerto Rico
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Malacostraca
- Decapoda
- Portunidae
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| see common names | |||||||
Geography
| Country: | Puerto Rico | State/province: | San Sebastian |
| Coordinates: | 18.3° North, 66.9° West (view map) | ||
| Paleocoordinates: | 19.2° North, 60.7° West (Wright 2013) | ||
| Basis of coordinate: | stated in text |
Time
| Period: | Paleogene | Epoch: | Oligocene |
| Stage: | Rupelian | 10 m.y. bin: | Cenozoic 4 |
| Key time interval: | Rupelian | ||
| Age range of interval: | 33.9 - 27.3 m.y. ago |
Stratigraphy
| Formation: | San Sebastian | ||||
| Stratigraphy comments: Overlying Formation: Lares Formation (Lares Limestone). Underlying Formation: Cretaceous to Eocene rocks. Thickness: Ranges from 0 m to 100 m, averaging about 70m. (Schweitzer et al., 2008; Monroe 1980). |
Lithology and environment
| Primary lithology: | carbonaceous claystone |
| Lithology description: Only one locality yielded fossil crustaceans, and it consists of carbonaceous clays and soft limestone found near the top of the formation, representing a transition into the overlying Lares Limestone. (Schweitzer et al., 2008). | |
| Environment: | lagoonal |
| Geology comments: Rivers draining the highlands present at that time supplied the clastic material deposited in the shallow marine environments, nearshore lagoons, and deltas. Estuaries and mangrove swamps are also elicited (Monroe 1980). The general depositional environment of this formation consists of nearshore lagoonal facies; the occurrence of freshwater/brackish vertebrates supports this interpretation (MacPhee and Wyss, 1990; MacPhee and Iturralde-Vinent, 1995). | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Reason for describing collection: | taxonomic analysis |
Metadata
| Database number: | 228677 | ||
| Authorizer: | J. Wolfe | Enterer: | A. Lynch |
| Created: | 2022-12-25 22:48:54 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2022-12-25 22:48:54 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 26356. | decapod | C. E. Schweitzer, J. Velez-Juarbe, M. Martiniez, A. Hull, R. M. Feldmann and H. Santos. 2008. New Cretaceous and Cenozoic Decapoda (Crustacea: Thalassinidea, Brachyura) from Puerto Rico, United States Territory. Bulletin of the Mizunami Fossil Museum 34:1-15 [C. Schweitzer/C. Schweitzer/M. Uhen] |