San Nicholas Island (SN-5): Quaternary, California

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Ateles squamigerus
Anthozoa - Scleractinia - Dendrophylliidae
Balanophyllia elegans Verrill 1864
Echinoidea - Camarodonta - Strongylocentrotidae
Strongylocentrotus cf. franciscanus (Agassiz 1863)
original and current combination Toxocidaris franciscana
Polyplacophora - Neoloricata - Mopaliidae
Mopalia muscosa (Gould 1846)
Bivalvia - Mytilida - Mytilidae
Mytilus californianus Conrad 1837
Bivalvia - Lucinida - Lucinidae
Epilucina californica (Conrad 1837)
original and current combination Phacoides californicus
Bivalvia - Cardiida - Lasaeidae
Lasaea cf. cistula Keen 1938
synonym of Lasaea adansoni
Bivalvia - Cardiida - Cardiidae
Clinocardium nuttallii (Conrad 1837)
recombined as Clinocardium (Clinocardium) nuttallii
Bivalvia - Cardiida - Semelidae
Cumingia californica Conrad 1837
Bivalvia - Cardiida - Veneridae
Transennella tantilla (Gould 1853)
recombined as Nutricola tantilla
Gastropoda - Lepetellida - Fissurellidae
Diodora cf. aspera (Rathke 1833)
Gastropoda - Lepetellida - Haliotidae
Haliotis cf. cracherodii Leach 1814
Gastropoda - Turbinidae
Astraea cf. gibberosa (Dillwyn 1817)
recombined as Pomaulax gibberosa
Homalopoma ? carpenteri (Pilsbry 1889)
synonym of Homalopoma (Homalopoma) luridum
Gastropoda - Trochidae
Tegula funebralis (Adams 1855)
original and current combination Chlorostoma funebrale
"Tegula" ? montereyi (Kiener 1850)
recombined as Chlorostoma montereyi
Gastropoda - Phasianellidae
Tricolia cf. pulloides (Carpenter 1865)
recombined as Eulithidium pulloides
Gastropoda - Patellida - Lottiidae
Acmaea pelta Eschscholtz 1833
recombined as Lottia pelta
Acmaea scabra (Gould 1846)
original and current combination Patella (Lottia) scabra
Acmaea limatula (Carpenter 1864)
original and current combination Patella limatula
Acmaea sp. n. sp. Eschscholtz 1830
Acmaea mitra Eschscholtz 1833
Gastropoda - Cerithiidae
Bittium eschrichtii (Middendorff 1849)
recombined as Neostylidium eschrichtii
Subspecies: Bittium eschrichtii montereyense
Gastropoda - Procerithiidae
Bittium cf. attenuatum Carpenter 1864
recombined as Lirobittium attenuatum
Gastropoda - Littorinidae
Lacuna ? unifasciata Carpenter 1857
recombined as Lacuna (Epheria) unifasciata
Gastropoda - Rissoidae
Alvania purpurea Dall 1871
recombined as Alvinia purpurea
Alvania sp. n. sp. Risso 1826
Gastropoda - Barleeiidae
Barleeia cf. oldroydae
Barleeia cf. subtenuis Carpenter 1864
"Diala" cf. marmorea Carpenter 1864
synonym of Pseudodiala acuta
Gastropoda - Caecidae
Caecum californicum Dall 1885
Gastropoda - Vermetidae
Spiroglyphus cf. lituellus (Morch 1861)
recombined as Dendropoma lituella
Petaloconchus anellum
Gastropoda - Neogastropoda
Barbarofusus ? arnoldi (Cossmann 1903)
recombined as Harfordia arnoldi
Gastropoda - Neogastropoda - Mitridae
Mitra idae Melville 1893
recombined as Mitra (Atrimitra) idae
Gastropoda - Neogastropoda - Columbellidae
Mitrella carinata (Hinds 1844)
recombined as Alia carinata
Mitrella cf. carinata (Hinds 1844)
recombined as Alia carinata
Subspecies: Mitrella carinata gausapata
Gastropoda - Neogastropoda - Buccinidae
"Searlesia" dira Reeve 1846
Gastropoda - Neogastropoda - Siphonaliidae
Calicantharus fortis (Carpenter 1866)
Gastropoda - Neogastropoda - Olividae
Olivella biplicata (Sowerby 1825)
recombined as Callianax biplicata
Gastropoda - Neogastropoda - Conidae
Conus cf. californicus Reeve 1844
recombined as Californiconus californicus
Gastropoda - Neogastropoda - Mangeliidae
Mangelia cf. variegata Carpenter 1864
recombined as Tenaturris variegata
Gastropoda - Neogastropoda - Pseudomelatomidae
Pseudomelatoma ? torosa (Gabb 1864)
Gastropoda - Neogastropoda - Muricidae
Ocenebra cf. lurida (Middendorff 1848)
recombined as Paciocinebrina lurida
Gastropoda - Cerithiopsidae
Cerithiopsis sp. Hanley 1849
Gastropoda - Neotaenioglossa - Calyptraeidae
Crepidula cf. onyx Sowerby 1824
Thecostraca - Balanomorpha - Balanidae
Balanus cf. nubilis
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:840 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:Sand Dune Canyon
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-5
Database number:37945
Authorizer:A. Hendy Enterer:A. Hendy
Modifier:A. Hendy Research group:marine invertebrate
Created:2004-03-27 13:09:44 Last modified:2013-11-25 13:37:23
Access level:the public Released:2004-03-27 13:09:44
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]