Asuncion Group - Santa Monica, Los Angeles: Coniacian, California
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Cephalopoda
- Ammonitida
- Desmoceratidae
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Hauericeras transitionale
Waring 1917
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| on p. 42 as "Metaplacenticeras transitionale," but correctly Hauericeras transitionale elsewhere (e.g., p. 219) | ||||||||||
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Cephalopoda
- Ammonitida
- Placenticeratidae
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Metaplacenticeras pacificum
(Smith 1900)
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Metaplacenticeras californicum
(Anderson 1902)
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Gastropoda
- Aporrhaidae
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Pugnellus rotundus
Waring 1917
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| recombined as Lispodesthes rotundatus | ||||||||||
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Bivalvia
- Cardiida
- Mactridae
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Crassatellites triangulatus
Waring 1917
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| recombined as Cymbophora triangulata | ||||||||||
| misspelled on p. 42 as "Crassatellites triangulata" | ||||||||||
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Bivalvia
- Pholadomyida
- Pholadomyidae
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Pholadomya subelongata
Meek 1857
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| see common names | ||||||||||
Geography
| Country: | United States | State/province: | California | County: | Los Angeles |
| Coordinates: | 34.0° North, 118.5° West (view map) | ||||
| Paleocoordinates: | 36.6° North, 83.7° West | ||||
| Basis of coordinate: | based on nearby landmark | ||||
| Geographic resolution: | outcrop |
Time
| Period: | Cretaceous | Epoch: | Late/Upper Cretaceous |
| Stage: | Coniacian | 10 m.y. bin: | Cretaceous 6 |
| Key time interval: | Coniacian | ||
| Age range of interval: | 89.80000 - 86.30000 m.y. ago |
Stratigraphy
| Geological group: | Asuncion | ||||
| Local section: | Santa Monica | ||||
| Regional section: | Los Angeles | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: Strata of Coniacian age. No species older than Coniacian in the assemblage. | |||||
Lithology and environment
| Lithology description: No lithologic data reported. Probably siliciclastic | |
| Environment: | marine indet. |
| Geology comments: No paleoenvironmental data reported. | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | selective quarrying,field collection |
| Reason for describing collection: | biostratigraphic analysis |
| Collection method comments: Listed in Waring (1917). Relisted by Anderson (1958). | |
| Taxonomic list comments:Representative, but not exhaustive. | |
Metadata
| Database number: | 44267 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2004-09-07 16:06:28 | Last modified: | 2013-11-25 13:37:23 |
| Access level: | the public | Released: | 2004-09-07 16:06:28 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 11610. | F. M. Anderson. 1958. Upper Cretaceous of the Pacific Coast. Geological Society of America Memoir 71:1-378 [A. Miller/A. Hendy/M. Clapham] |