Deadman Island - Zone 3 [Timms Point Silt]: Middle Pleistocene, California
collected by C. Crickmay 1920
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Gastropoda
- Neogastropoda
- Mangeliidae
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Cytharella branneri
(Arnold 1903)
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R category | ||||||
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Gastropoda
- Neogastropoda
- Fasciolariidae
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Barbarofusus barbarensis
(Trask 1855)
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C category | ||||||
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Gastropoda
- Ranellidae
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Argobuccinum oregonense
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Gastropoda
- Triviidae
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Trivia ritteri
Raymond 1903
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R category | ||||||
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Gastropoda
- Turritellidae
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Turritella cooperi
Carpenter 1864
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C category | ||||||
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Turritella cf. jewetti
(Carpenter 1866)
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R category | ||||||
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Gastropoda
- Epitoniidae
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Epitonium indianorum
(Carpenter 1864)
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R category | ||||||
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Gastropoda
- Trochidae
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Calliostoma canaliculatum
(Lightfoot 1786)
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Gastropoda
- Turbinidae
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Astraea undosa
(Wood 1828)
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R category | ||||||
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Bivalvia
- Pectinida
- Pectinidae
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Chlamys hericia
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Chlamys jordani
(Arnold 1903)
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Pecten stearnsii
Dall 1878
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= Leopecten diegensis
Dall 1898
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Hendy 2021 | ||||||
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Bivalvia
- Cardiida
- Tellinidae
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Macoma sp.
Leach 1819
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Bivalvia
- Cardiida
- Chamidae
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Chama pellucida
Broderip 1835
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= Chama arcana
Bernard 1976
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Hendy 2021 | ||||||
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Bivalvia
- Carditida
- Carditidae
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Venericardia ventricosa
(Gould 1850)
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Venericardia barbarensis
Stearns 1890
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Bivalvia
- Nuculida
- Nuculidae
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Nucula castrensis
Hinds 1843
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Anthozoa
- Scleractinia
- Caryophylliidae
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Caryophyllia californica
Vaughan 1903
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| see common names | |||||||
Geography
| Country: | United States | State/province: | California | County: | Los Angeles |
| Coordinates: | 33.7° North, 118.3° West (view map) | ||||
| Paleocoordinates: | 33.7° North, 118.3° West | ||||
| Basis of coordinate: | estimated from map | ||||
| Geographic resolution: | local area |
Time
| Period: | Quaternary | Epoch: | Pleistocene |
| Stage: | Chibanian | 10 m.y. bin: | Cenozoic 6 |
| Key time interval: | Middle Pleistocene | ||
| Age range of interval: | 0.774 - 0.129 m.y. ago |
Stratigraphy
| Formation: | Timms Point Silt | ||||
| Local section: | Deadman Island | Local bed: | 3 | ||
| Local order: | bottom to top | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: LITHOSTRATIGRAPHY: From what Crickmay (1929) considered the "Santa Barbara beds" [=Timms Point Silt]: AGE: Middle Pleistocene (~0.6-0.4 Ma) based on current understanding of the Timms Point Silt. From Crickmay (1929) - It permits a tentative correlation of these shales with the formation which crops out along the coast from San Pedro to Point Fermin. These have been supposed to be of Miocene age, though it must be confessed there is very little reason for that correlation. The dating of these beds, and the estimation of the hiatus between them and the Santa Barbara formation, should be regarded as problems. STRATIGRAPHIC RESOLUTION: Upon zone No. 2 on the west side of the island lies zone No. 3, a deposit of fine yellow sand averaging 20 inches in thickness. On the east side of the island, on account of the failure of zones I and 2, zone 3 lies directly upon the Miocene(?) basement. In this zone the fossils are numerous but not crowded. They are evenly distributed through the bed. | |||||
Lithology and environment
| Primary lithology: | pebbly,yellow unlithified sandstone |
| Includes fossils? | Y |
| Lithology description: SPECIFIC LITHOLOGY: A deposit of fine yellow sand averaging 20 inches in thickness. LITHIFICATION: Unknown, but based on material preserved in material and above description it is likely unlithified. | |
| Environment: | offshore |
| Geology comments: ENVIRONMENT: Not stated, but based on current understanding of the units likely collected the list represents mid- through outer shelf, siliciclastic depositional settings. | |
Taphonomy
| Modes of preservation: | body,original aragonite,original calcite |
| Size of fossils: | macrofossils,mesofossils,microfossils |
Collection methods and comments
| Collection methods: | field collection | ||
| Reason for describing collection: | biostratigraphic analysis | ||
| Collectors: | C. Crickmay | Collection dates: | 1920s |
| Collection method comments: COLLECTOR: C.H. Crickmay. REPOSITORY: Unknown. | |||
| Taxonomic list comments:TAXONOMIC COVERAGE: The fossil fauna a partial list of what is important. NOMENCLATURE: Antiquated, but resolved to species resolution. | |||
Metadata
| Database number: | 222978 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2021-11-01 11:05:55 | Last modified: | 2021-11-13 22:56:20 |
| Access level: | authorizer only | Released: | 2022-05-01 11:05:55 |
| Creative Commons license: | CC BY |
Reference information