San Nicholas Island (SN-4): Quaternary, California
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Anthozoa
- Scleractinia
- Dendrophylliidae
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Balanophyllia elegans
Verrill 1864
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Bivalvia
- Carditida
- Carditidae
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Glans subquadrata
(Carpenter 1864)
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synonym of Glans carpenteri | |||||||
Bivalvia
- Cardiida
- Semelidae
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Cumingia californica
Conrad 1837
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Bivalvia
- Lucinida
- Lucinidae
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Epilucina californica
(Conrad 1837)
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original and current combination Phacoides californicus | |||||||
Bivalvia
- Mytilida
- Mytilidae
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Mytilus californianus
Conrad 1837
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Bivalvia
- Pectinida
- Pectinidae
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Hinnites giganteus
(Gray 1825)
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recombined as Crassadoma gigantea | |||||||
Polyplacophora
- Neoloricata
- Acanthochitonidae
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"Cryptochiton" stelleri
(Middendorf 1847)
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Gastropoda
- Neotaenioglossa
- Calyptraeidae
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Crepipatella lingulata
(Gould 1846)
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Gastropoda
- Procerithiidae
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Bittium ? armillatum
Carpenter 1864
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recombined as Lirobittium armillatum | |||||||
Gastropoda
- Caecidae
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Fartulum ? occidentale
Bartsch 1920
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synonym of Fartulum dextroversum | |||||||
Caecum cf. californicum
Dall 1885
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Gastropoda
- Barleeiidae
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Barleeia cf. subtenuis
Carpenter 1864
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Gastropoda
- Neogastropoda
- Muricidae
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Ocenebra cf. lurida
(Middendorff 1848)
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recombined as Paciocinebrina lurida | |||||||
? Maxwellia cf. gemma
(Sowerby 1879)
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Gastropoda
- Neogastropoda
- Conidae
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Conus californicus
Reeve 1844
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recombined as Californiconus californicus | |||||||
Gastropoda
- Neogastropoda
- Mitridae
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Mitra idae
Melville 1893
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recombined as Mitra (Atrimitra) idae | |||||||
Gastropoda
- Neogastropoda
- Olividae
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Olivella biplicata
(Sowerby 1825)
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recombined as Callianax biplicata | |||||||
Gastropoda
- Perissityidae
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Amphissa cf. versicolor
Dall 1871
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Littorina cf. scutulata
Gould 1849
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recombined as Littorina (Littorina) scutulata | |||||||
Littorina cf. planaxis
Philippi 1847
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replaced by Littorina (Neritrema) keenae | |||||||
Lacuna unifasciata
Carpenter 1857
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recombined as Lacuna (Epheria) unifasciata | |||||||
Gastropoda
- Fasciolariidae
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Hipponix antiquatus
(Linnaeus 1767)
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= Antisabia panamensis
Adams 1852
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Hendy 2020 | ||||||
Triphora cf. pedroana
(Bartsch 1907)
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recombined as Monophorus pedroanus | |||||||
Seila montereyensis
Bartsch 1907
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Gastropoda
- Lepetellida
- Fissurellidae
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Diodora ? aspera
(Rathke 1833)
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Fissurella volcano
Reeve 1849
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Gastropoda
- Lepetellida
- Haliotidae
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Haliotis cf. cracherodii
Leach 1814
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Gastropoda
- Patellida
- Lottiidae
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Acmaea mitra
Eschscholtz 1833
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Lottia gigantea
Sowerby 1834
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Acmaea scabra
(Gould 1846)
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original and current combination Patella (Lottia) scabra | |||||||
see common names |
Geography
Country: | United States | State/province: | California | County: | Ventura |
Coordinates: | 33.2° North, 119.6° West (view map) | ||||
Paleocoordinates: | 33.2° North, 119.2° West | ||||
Basis of coordinate: | stated in text | ||||
Altitude: | 85 feet | ||||
Geographic resolution: | outcrop |
Time
Period: | Quaternary |
10 m.y. bin: | Cenozoic 6 |
Key time interval: | Quaternary |
Age range of interval: | 2.58000 - 0.00000 m.y. ago |
Stratigraphy
Formation: | Unnamed | ||||
Local section: | Seal Beach | ||||
Regional section: | San Nicholas Island | ||||
Stratigraphic resolution: | bed | ||||
Stratigraphy comments: Dune sand and fossiliferous marine terrace deposits of Quaternary age. These overlie Eocene strata. Fossils come from seven well-developed wave-cut platforms at altitudes of 25 to 990 feet. Several submerged terraces are present on the shelf adjacent to the island., the lowest being 400 ft below sea-level. Presumably all the terrace platforms on San Nicholas Island were cut later than the middle Pleistocene diastrophism recognized elsewhere in southern California. Terrace platforms are covered with a variety of sediments of marine and non-marine origin and range in thickness from a few inches to many feet. |
Lithology and environment
Primary lithology: | pebbly,shelly/skeletal conglomeratic,calcareous sandstone |
Includes fossils? | Y |
Lithology description: Generally comprise poorly sorted calcareous sand and gravel composed primarily of mollusc shell fragments, echinoid plates and spines, calcareous algae, and bryozoans. | |
Environment: | coastal indet. |
Glacial or sequence phase: | transgressive systems tract |
Geology comments: Higher emergent terraces may represent wave-abraded platforms that were eroded during eustatic changes in sea level combined with tectonic uplift. The lowest emergent terrace may have been cut during eustatic sea-level changes followed by very slight regional seaward warping. Presumably all the terrace platforms on San Nicholas Island were cut later than the middle Pleistocene diastrophism recognized elsewhere in southern California |
Taphonomy
Modes of preservation: | body |
Size of fossils: | macrofossils |
Collection methods and comments
Collection excludes: | some macrofossils,some microfossils |
Collection methods: | selective quarrying,field collection |
Reason for describing collection: | general faunal/floral analysis |
Collection method comments: Collections made by Vedder et al (1955-1956). Earlier collections by Cooper (1894), and Howard (1955) | |
Taxonomic list comments:Comprehensive for invertebrates |
Metadata
Also known as: | Vedder & Norris (1963) SN-4 | ||
Database number: | 37946 | ||
Authorizer: | A. Hendy | Enterer: | A. Hendy |
Modifier: | A. Hendy | Research group: | marine invertebrate |
Created: | 2004-03-27 13:10:43 | Last modified: | 2013-11-25 13:37:23 |
Access level: | the public | Released: | 2004-03-27 13:10:43 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
10107. | J. G. Vedder and R. M. Norris. 1963. Geology of San Nicolas Island, California. United States Geological Survey Professional Paper 369:1-65 [A. Miller/A. Hendy/P. Wagner] |
Secondary references:
63217 | A. J. W. Hendy. 2020. Unpublished taxonomic backbone for Eastern Pacific Invertebrate Communities of the Cenozoic (EPICC) Thematic Collections Network. [A. Hendy/A. Hendy/A. Hendy] |