Bed 50, Section 4 - Celendín [Romirón Fm]: Late/Upper Cenomanian, Peru
collected by Benavides
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Bivalvia
- Ostreida
- Gryphaeidae
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Exogyra olisiponensis
Sharpe 1850
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| recombined as Costagyra olisiponensis | |||||||
| see common names | |||||||
Geography
| Country: | Peru | State/province: | Cajamarca |
| Coordinates: | 6.9° South, 78.2° West (view map) | ||
| Paleocoordinates: | 13.7° South, 53.6° West | ||
| Basis of coordinate: | based on nearby landmark | ||
| Geographic resolution: | outcrop |
Time
| Period: | Cretaceous | Epoch: | Late/Upper Cretaceous |
| Stage: | Cenomanian | 10 m.y. bin: | Cretaceous 5 |
| Key time interval: | Late/Upper Cenomanian | ||
| Age range of interval: | 100.50000 - 93.90000 m.y. ago |
Stratigraphy
| Formation: | Romirón | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: LITHOSTRATIGRAPHY: From the Romirón Fm, which locally overlies the Pullucicana Gp (Albian-Cenomanian), and is overlain by the Coñor Fm (Turonian). AGE: Late Cenomanian, on the basis of ammonite biostratigraphy; Acanthoceras chasca zone. STRATIGRAPHIC POSITION: Collection from unit 50, a 1 m thick limestone unit, near middle of section. | |||||
Lithology and environment
| Primary lithology: | nodular,brown,yellow lithified argillaceous "limestone" |
| Includes fossils? | Y |
| Lithology description: LITHOLOGY: Limestone, argillaceous, yellowish brown, nodular, fossiliferous. LITHIFICATION: Lithified, on the basis of facies description. | |
| Environment: | carbonate indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | surface (in situ),field collection |
| Reason for describing collection: | general faunal/floral analysis |
| Museum repositories: | AMNH |
| Collectors: | Benavides |
| Collection method comments: COLLECTOR: V. E. Benavides. REPOSITORY: AMNH. | |
| Taxonomic list comments:COVERAGE: Probably not exhaustive, but representative for ammonoids, bivalves, and other invertebrates groups. NOMENCLATURE: Authoritative publication, but with somewhat antiquated nomenclature, and species-resolution identifications. | |
Metadata
| Database number: | 88158 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2009-04-02 07:56:50 | Last modified: | 2013-11-25 13:37:23 |
| Access level: | the public | Released: | 2009-04-02 07:56:50 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 15338. | V.E. Benavides-Caceres. 1956. Cretaceous system in northern Peru. Bulletin of the American Museum of Natural History 108(4):1-493 [A. Miller/A. Hendy] |