CSUN Loc. 966, Santa Susana Mountains: Ypresian, California
collected by R. L. Squires 1986
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Gastropoda
- Heterostropha
- Architectonicidae
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Architectonica (Architectonica) llajasensis
(Sutherland 1966)
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Gastropoda
- Turritellidae
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Turritella andersoni
Dickerson 1916
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| as Turritella andersoni susanae | ||||||||||
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Gastropoda
- Neritidae
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Corsania (Januncia) susana
Saul and Squires 1997
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Saul and Squires 1997 | |||||||||
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Malacostraca
- Decapoda
- Tumidocarcinidae
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Cyclocorystes aldersoni
Squires 1980
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| see common names | ||||||||||
Geography
| Country: | United States | State/province: | California | County: | Ventura |
| Coordinates: | 34.3° North, 118.7° West (view map) | ||||
| Paleocoordinates: | 36.8° North, 101.7° West | ||||
| Altitude: | 529 meters |
Time
| Period: | Paleogene | Epoch: | Eocene |
| Stage: | Ypresian | 10 m.y. bin: | Cenozoic 2 |
| Key time interval: | Ypresian | ||
| Age range of interval: | 56.00000 - 47.80000 m.y. ago |
Stratigraphy
| Formation: | Santa Susana | ||||
| Stratigraphy comments: within upper 100m of Santa Susana Formation |
Lithology and environment
| Primary lithology: | lag,very fine,gray silty sandstone |
| Includes fossils? | Y |
| Lithology description: The upper 100 m of the approximately 1000-m-thick Santa Susana Formation in the Simi Valley area consists mostly of gray, very fine-grained sandstone, with some gray muddy to sandy siltstone. Locally, there are concentrations of fossil-shell hash, and rocks surrounding these localized concentrations are barren of megafossils. The lower part of the upper 100 m of the Santa Susana Formation has a gradational lithology from the underlying gray mudstone and siltstone. | |
| Environment: | offshore |
| Glacial or sequence phase: | transgressive |
Taphonomy
| Modes of preservation: | body,mold/impression |
| Degree of concentration: | -single event |
| Size of fossils: | macrofossils,mesofossils |
| Spatial orientation: | preferred |
| Fragmentation: | frequent |
| Encrustation: | none |
| Temporal resolution: | condensed |
| Spatial resolution: | parautochthonous |
Collection methods and comments
| Collection methods: | bulk,field collection,survey of museum collection | ||
| Reason for describing collection: | general faunal/floral analysis | ||
| Museum repositories: | LACM | ||
| Collectors: | R. L. Squires | Collection dates: | February 28, 1986 |
Metadata
| Also known as: | LACMIP Loc. 16893; LACMIP Loc. 26609 | ||
| Database number: | 207313 | ||
| Authorizer: | J. Marcot | Enterer: | J. Marcot |
| Modifier: | J. Marcot | Research group: | marine invertebrate |
| Created: | 2020-01-06 17:11:41 | Last modified: | 2020-02-12 12:34:56 |
| Access level: | the public | Released: | 2020-01-06 17:11:41 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 71392. | R. L. Squires. 1999. Upper Paleocene to Lower Eocene ("Meganos Stage") Marine Megafossils in the Uppermost Santa Susana Formation, Simi Valley, Southern California. Contributions in Science, Los Angeles County Museum 479:1-38 [J. Marcot/J. Marcot] |
Secondary references:
| 76939 | L. R. Saul and R. L. Squires. 1997. New species of neritid gastropods from Cretaceous and Lower Cenozoic strata of the Pacific Slope of North America. The Veliger 40(2):131-147 [J. Marcot/J. Marcot] |