Locality 10, Bracket Mesa - Beal (1948): Paleocene, Mexico
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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unclassified
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Cyclichna sp.
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Bivalvia
- Carditida
- Carditidae
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Venericardia sp.
Lamarck 1801
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Bivalvia
- Arcida
- Cucullaeidae
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Cucullaea mathewsonii
Gabb 1864
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Gastropoda
- Cerithiidae
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Cerithium sp.
Bruguière 1789
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| Listed a "Cerithium 2 sp., cf. large Cerithia from St. Bartholomew" | ||||||||||
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Gastropoda
- Turritellidae
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Turritella variata
Conrad 1857
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| see common names | ||||||||||
Geography
| Country: | Mexico | State/province: | Baja California Sur | County: | San Fernando |
| Coordinates: | 31.8° North, 116.6° West (view map) | ||||
| Paleocoordinates: | 36.0° North, 96.0° West | ||||
| Basis of coordinate: | based on nearby landmark | ||||
| Geographic resolution: | outcrop |
Time
| Period: | Paleogene | Epoch: | Paleocene |
| 10 m.y. bin: | Cenozoic 1 | ||
| Key time interval: | Paleocene | ||
| Age range of interval: | 66.00000 - 56.00000 m.y. ago |
Stratigraphy
| Formation: | Tepetate | ||||
| Local section: | Bracket Mesa | ||||
| Regional section: | Baja California Su | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: Paleocene and Eocene series are named the Tepetate Formation in Baja California. The strata probably underlie a large part of the region covered by latter rocks, the uppermost beds lapping over the edges of the older formations and lying on the granite of the main range. Related to both Martinez (Paleocene) and Tejon) Eocene) of Californa, although further work suggests Paleocene faunal affinities are stronger. | |||||
Lithology and environment
| Primary lithology: | fine,yellow siltstone |
| Secondary lithology: | "cross stratification" sandstone |
| Includes fossils? | Y |
| Includes fossils? | Y |
| Lithology description: In many places it is composed largely of fine yellow silt and contains sandstone beds with mammoth cross-bedding. | |
| Environment: | deltaic indet. |
| Geology comments: The formation shows strong evidence of being a delta and near-shore deposit. | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | selective quarrying,field collection |
| Reason for describing collection: | general faunal/floral analysis |
| Collection method comments: Collection studied and determined by J. Smith (Stanford), Gardner and Stewart (USGS). No known repository. | |
| Taxonomic list comments:Representative. | |
Metadata
| Also known as: | Loc. 10 | ||
| Database number: | 43763 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2004-08-25 10:48:56 | Last modified: | 2013-11-25 13:37:23 |
| Access level: | the public | Released: | 2004-08-25 10:48:56 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 11515. | C. H. Beal. 1948. Reconnaissance of the geology and oil possibilities of Baja California, Mexico. Geological Society of America Memoir 31 [A. Miller/A. Hendy/A. Hendy] |