A 3528 - Arroyo Blanco, Carmen Island: Early/Lower Pliocene, Mexico
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Echinoidea
- Spatangoida
- Brissidae
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Meoma sp.
Gray 1851
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Bivalvia
- Pectinida
- Spondylidae
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Spondylus ? victoriae
Sowerby 1843
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= Spondylus princeps
Broderip 1833
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Moore 1987 | |||||||||
| Not Spondylus victoriae Sowerby 1843 | ||||||||||
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Bivalvia
- Pectinida
- Pectinidae
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Aequipecten abietis
(Jordan and Hertlein 1926)
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| recombined as Argopecten abietis | ||||||||||
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Bivalvia
- Ostreida
- Ostreidae
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Ostrea vespertina
Conrad 1855
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| recombined as Dendostrea vespertina | ||||||||||
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Ostrea megodon
Hanley 1846
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| recombined as Undulostrea megodon | ||||||||||
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Bivalvia
- Arcida
- Arcidae
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Anadara (Anadara) formosa
(Sowerby 1833)
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| recombined as Anadara formosa | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Mexico | State/province: | Baja California Sur |
| Coordinates: | 26.0° North, 111.1° West (view map) | ||
| Paleocoordinates: | 25.8° North, 109.8° West | ||
| Basis of coordinate: | based on nearby landmark | ||
| Geographic resolution: | outcrop |
Time
| Period: | Neogene | Epoch: | Pliocene |
| Stage: | Zanclean | 10 m.y. bin: | Cenozoic 6 |
| Key time interval: | Early/Lower Pliocene | ||
| Age range of interval: | 5.33300 - 3.60000 m.y. ago |
Stratigraphy
| Formation: | San Marcos | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: Resting on the Comondu Formation is about 200 ft of volcanic gravels, sandstones, and siltstones; many of the finer clastics contain fossils. The fossils indicate correlation to the San Marcos Formation of California (lower Pliocene). Collected from 20 ft higher than A 3528. | |||||
Lithology and environment
| Primary lithology: | "cross stratification",shelly/skeletal lithified sandstone |
| Secondary lithology: | "cross stratification",shelly/skeletal conglomerate |
| Includes fossils? | Y |
| Includes fossils? | Y |
| Lithology description: Fossilis from near base of sand and gravel succession. | |
| Environment: | coastal indet. |
| Geology comments: No paleoenvironmental data provided. Obviously shallow water. | |
Taphonomy
| Modes of preservation: | body,mold/impression |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection excludes: | some macrofossils |
| Collection methods: | selective quarrying,field collection |
| Reason for describing collection: | biostratigraphic analysis |
| Museum repositories: | UCMP |
| Collection method comments: Material reposited in the UCMP collections | |
| Taxonomic list comments:Exhaustive. Identified by J.W. Durham. | |
Metadata
| Also known as: | A 3528 | ||
| Database number: | 43847 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2004-08-26 17:27:18 | Last modified: | 2013-11-25 13:37:23 |
| Access level: | group members | Released: | 2005-08-26 17:27:18 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 11549. | J. W. Durham. 1950. 1940 E.W. Scripps cruise to the Gulf of California. Part II - Megascopic paleontology and marine stratigraphy. Geological Society of America Memoir 43(2) [A. Miller/A. Hendy/A. Hendy] |