CAS Loc. 39405, Isla Cerralvo: Pliocene, Mexico
collected by Hanna & Durham
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Echinoidea
- Spatangoida
- Brissidae
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Meoma sp.
Gray 1851
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Gastropoda
- Turritellidae
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Turritella marcosensis
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see common names |
Geography
Country: | Mexico | State/province: | Baja California Sur |
Coordinates: | 24.3° North, 109.9° West (view map) | ||
Paleocoordinates: | 24.1° North, 108.6° West | ||
Basis of coordinate: | based on nearby landmark | ||
Geographic resolution: | outcrop |
Time
Period: | Neogene | Epoch: | Pliocene |
10 m.y. bin: | Cenozoic 6 | ||
Key time interval: | Pliocene | ||
Age range of interval: | 5.33300 - 2.58000 m.y. ago |
Stratigraphy
Local section: | Isla Cerralvo | Local bed: | 250 ft | ||
Local order: | bottom to top | ||||
Stratigraphic resolution: | bed | ||||
Stratigraphy comments: STRATIGRAPHIC RELATIONS: From unknown lithostratigraphic unit, which is an inlier, unconformably in contact with granites and metamorphics. AGE: Middle Pliocene, on the basis of macrofossil biostratigraphy. STRATIGRAPHIC POSITION: From 250 feet above base of section. |
Lithology and environment
Primary lithology: | poorly lithified siltstone |
Secondary lithology: | poorly lithified sandstone |
Includes fossils? | Y |
Includes fossils? | Y |
Lithology description: SPECIFIC LITHOLOGY: Silty and sandy beds. LITHIFICATION: Poorly-lithified, on the basis of comments in text. | |
Environment: | coastal indet. |
Taphonomy
Modes of preservation: | body,original calcite |
Size of fossils: | macrofossils |
Collection methods and comments
Collection methods: | surface (in situ),field collection |
Reason for describing collection: | taxonomic analysis |
Museum repositories: | CAS |
Collectors: | Hanna & Durham |
Collection method comments: COLLECTORS: Hanna & Durham. REPOSITORY: CAS | |
Taxonomic list comments:COVERAGE: Exhaustive for molluscs; whale bones mentioned but not identified. NOMENCLATURE: Authoritative publication, with somewhat antiquated nomenclature, but with species-resolution identifications. |
Metadata
Database number: | 96581 | ||
Authorizer: | A. Hendy | Enterer: | A. Hendy | Research group: | marine invertebrate |
Created: | 2010-06-13 11:46:22 | Last modified: | 2013-11-25 13:37:23 |
Access level: | the public | Released: | 2010-06-13 11:46:22 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
32782. | L. G. Hertlein. 1966. Pliocene fossils from Rancho El Refugio, Baja California and Cerralvo Island, Mexico. Proceedings of the California Academy of Sciences 30(14):265-284 [A. Hendy/A. Hendy] |