Lower Conglomerate, Vaqueros Fm - Near Point, Santa Cruz Island: Chattian, California
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Thecostraca
- Balanomorpha
- Tetraclitidae
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Tetraclita sp.
Schumacher 1817
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Thecostraca
- Balanomorpha
- Balanidae
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Balanus sp.
Da Costa 1778
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Gastropoda
- Neogastropoda
- Muricidae
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Rapana vaquerosensis
(Arnold 1908)
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| recombined as Califrapana vaquerosensis | ||||||||||
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Trophon sp.
Montfort 1810
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Gastropoda
- Neogastropoda
- Conidae
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Conus sp.
Linnaeus 1758
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Gastropoda
- Naticidae
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Polinices recluzianus
(Deshayes 1839)
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| recombined as Glossaulax reclusiana | ||||||||||
| Subspecies: Polinices recluzianus andersoni | ||||||||||
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Gastropoda
- Neotaenioglossa
- Calyptraeidae
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Calyptraea ? filosa
(Gabb 1866)
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Gastropoda
- Turritellidae
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Turritella ocoyana
Conrad 1855
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Bivalvia
- Cardiida
- Cardiidae
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Cardium (Trachycardium) vaquerosensis
Arnold 1908
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| recombined as Dallocardia vaquerosense | ||||||||||
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Bivalvia
- Cardiida
- Veneridae
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Chione sp.
von Mühlfield 1811
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Dosinia merriami
Clark 1915
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Dosinia margaritana
Wiedey 1928
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| recombined as Dosinia (Dosinidia) margaritana | ||||||||||
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Bivalvia
- Pectinida
- Pectinidae
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Pecten vanvlecki
Arnold 1908
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| recombined as Amussiopecten vanvlecki | ||||||||||
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Lyropecten miguelensis
(Arnold 1906)
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Bivalvia
- Pectinida
- Spondylidae
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Spondylus perrini
Wiedey 1928
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Bivalvia
- Ostreida
- Ostreidae
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Ostrea miguelensis
Hertlein 1928
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| recombined as Acutostrea miguelensis | ||||||||||
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Bivalvia
- Mytilida
- Mytilidae
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Mytilus expansus
(Arnold 1907)
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| recombined as Crenomytilus expansus | ||||||||||
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Scaphopoda
- Dentaliida
- Dentaliidae
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Dentalium sp.
Linnaeus 1758
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Echinoidea
- Clypeasteroida
- Echinarachniidae
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Vaquerosella fairbanksi
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| see common names | ||||||||||
Geography
| Country: | United States | State/province: | California | County: | Santa Barbara |
| Coordinates: | 34.0° North, 120.0° West (view map) | ||||
| Paleocoordinates: | 32.6° North, 111.8° West | ||||
| Basis of coordinate: | based on nearby landmark | ||||
| Geographic resolution: | outcrop |
Time
| Period: | Paleogene | Epoch: | Oligocene |
| Stage: | Chattian | 10 m.y. bin: | Cenozoic 4 |
| Key time interval: | Chattian | ||
| Age range of interval: | 27.82000 - 23.03000 m.y. ago |
Stratigraphy
| Formation: | Vaqueros | Member: | Lower Conglomerate | ||
| Local section: | Near Point | ||||
| Regional section: | Santa Barbara | ||||
| Stratigraphic resolution: | member | ||||
| Stratigraphy comments: The Vaqueros Formation is subdivided into two units on Santa Cruz Island, a lower conglomerate unit and an upper volcanic arenite. The collection is from the congomerate, which rests disconformably on the upper Eocene variegated shales of the Cozy Dell Formation, is 555 ft thick and comprised primarily of horneblende-diorite clasts. | |||||
Lithology and environment
| Primary lithology: | medium,coarse,shelly/skeletal lithified sandy,calcareous conglomerate |
| Includes fossils? | Y |
| Lithology description: Conglomerate, with fossiliferous, poorly sorted medium to coarse sandstone, and calcareous cement. | |
| Environment: | coastal indet. |
| Geology comments: High energy, shallow-water siliciclastic environment. | |
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: Reported by Bereskin and Edward. Not sure of any repositories. | |
| Taxonomic list comments:Nomenclature appears reasonable. Unsure of identifier. | |
Metadata
| Database number: | 52417 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2005-08-04 20:42:36 | Last modified: | 2013-11-25 13:37:23 |
| Access level: | the public | Released: | 2005-08-04 20:42:36 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 14094. | D. E. Weaver. 1969. Geology of the Northern Channel Islands. American Association of Petroleum Geologists - Pacific Section [A. Miller/A. Hendy/A. Hendy] |