San Nicholas Island (SN-14): Quaternary, California

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Cysticus cf. regularis
Gastropoda - Heterostropha - Pyramidellidae
Odostomia cf. oldroydi
Odostomia cf. virginalis
Turbonilla cf. raymondi
Gastropoda - Lepetellida - Fissurellidae
Fissurella volcano Reeve 1849
Gastropoda - Trochidae
Pupillaria cf. optabilis (Carpenter 1864)
recombined as Lirularia optabilis
Gastropoda - Phasianellidae
Tricolia cf. pulloides (Carpenter 1865)
recombined as Eulithidium pulloides
Gastropoda - Turbinidae
Homalopoma carpenteri (Pilsbry 1889)
synonym of Homalopoma (Homalopoma) luridum
Astraea cf. gibberosa (Dillwyn 1817)
recombined as Pomaulax gibberosa
Gastropoda - Patellida - Lottiidae
Acmaea sp. n. sp. Eschscholtz 1830
Acmaea mitra Eschscholtz 1833
Acmaea limatula (Carpenter 1864)
original and current combination Patella limatula
Gastropoda - Cerithiidae
Bittium cf. eschrichtii (Middendorff 1849)
recombined as Neostylidium eschrichtii
Subspecies: Bittium eschrichtii montereyense
Gastropoda - Neotaenioglossa - Calyptraeidae
Crepidula adunca Sowerby 1824
Crepidula ? onyx Sowerby 1824
Gastropoda - Procerithiidae
Bittium attenuatum Carpenter 1864
recombined as Lirobittium attenuatum
Bittium ? armillatum Carpenter 1864
recombined as Lirobittium armillatum
Gastropoda - Hipponicidae
Hipponix antiquatus (Linnaeus 1767)
    = Antisabia panamensis Adams 1852
Hendy 2020
Gastropoda - Littorinidae
Lacuna cf. unifasciata Carpenter 1857
recombined as Lacuna (Epheria) unifasciata
Littorina ? scutulata Gould 1849
recombined as Littorina (Littorina) scutulata
Gastropoda - Naticidae
Cryptonatica cf. clausa (Broderip and Sowerby 1829)
synonym of Cryptonatica affinis
Gastropoda - Rissoidae
"Rissoina" cf. aequisculpta (Keep 1887)
recombined as Alvinia aequisculpta
Alvania cf. oldroydae Bartsch 1911
recombined as Actonia oldroydae
Gastropoda - Barleeiidae
Amphithalamus inclusus Lozouet 1998
Amphithalamus tenuis Bartsch 1911
Barleeia subtenuis Carpenter 1864
Barleeia cf. oldroydi Bartsch 1920
Gastropoda - Vitrinellidae
Vitrinella cf. oldroydi Bartsch 1907
Gastropoda - Caecidae
Fartulum cf. orcutti (Dall in Orcutt 1885)
Fartulum occidentale Bartsch 1920
synonym of Fartulum dextroversum
Gastropoda - Neogastropoda - Columbellidae
Amphissa versicolor Dall 1871
Gastropoda - Neogastropoda - Siphonaliidae
Calicantharus fortis (Carpenter 1866)
Gastropoda - Neogastropoda - Mangeliidae
Mangelia aff. rhyssa
corrected as Cythara (Mangelia)
Mangelia fuscoligata
corrected as Cythara (Mangelia)
Mangelia variegata Carpenter 1864
recombined as Tenaturris variegata
Gastropoda - Neogastropoda - Olividae
Olivella biplicata (Sowerby 1825)
recombined as Callianax biplicata
Gastropoda - Neogastropoda - Muricidae
Thais emarginata
Ocenebra ? interfossa (Carpenter 1864)
recombined as Paciocinebrina interfossa
Subspecies: Ocenebra interfossa clathrata
Ocenebra cf. lurida (Middendorff 1848)
recombined as Paciocinebrina lurida
Gastropoda - Neogastropoda - Cystiscidae
Gibberulina pyriformis (Carpenter 1864)
synonym of Granulina margaritula
Gastropoda - Neogastropoda
Barbarofusus ? arnoldi (Cossmann 1903)
recombined as Harfordia arnoldi
Gastropoda - Vermetidae
Spiroglyphus cf. lituellus (Morch 1861)
recombined as Dendropoma lituella
Bivalvia - Pectinida - Pectinidae
Pecten diegensis Dall 1898
recombined as Leopecten diegensis
Bivalvia - Arcida - Glycymerididae
Glycymeris cf. subobsoleta (Carpenter 1864)
synonym of Glycymeris septentrionalis
Bivalvia - Cardiida - Lasaeidae
Lasaea cf. cistula Keen 1938
synonym of Lasaea adansoni
Bivalvia - Cardiida - Veneridae
Saxidomus ? nuttalli Conrad 1837
Turtonia cf. minuta (Fabricius 1780)
Bivalvia - Lucinida - Lucinidae
Epilucina californica (Conrad 1837)
original and current combination Phacoides californicus
Bivalvia - Carditida - Carditidae
Miodontiscus prolongatus (Carpenter 1864)
Polyplacophora - Neoloricata - Mopaliidae
Mopalia muscosa (Gould 1846)
Mopalia cf. hindsii (Sowerby 1847)
Anthozoa - Scleractinia - Dendrophylliidae
Balanophyllia elegans Verrill 1864
see common names

Geography
Country:United States State/province:California County:Ventura
Coordinates: 33.2° North, 119.5° West (view map)
Paleocoordinates:33.2° North, 119.2° West
Basis of coordinate:stated in text
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:Mineral Creek
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 Norris (1955). Earlier collections by Cooper (1894), and Howard (1955)
Taxonomic list comments:Comprehensive for invertebrates
Metadata
Also known as:Vedder & Norris (1963) SN-14
Database number:37936
Authorizer:A. Hendy Enterer:A. Hendy
Modifier:A. Hendy Research group:marine invertebrate
Created:2004-03-27 12:54:21 Last modified:2013-11-25 13:37:23
Access level:the public Released:2004-03-27 12:54:21
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]