Also known as Vedder & Norris (1963) SN-6
Where: Ventura County, California (33.2° N, 119.5° W: paleocoordinates 33.2° N, 119.2° W)
• coordinate stated in text
• outcrop-level geographic resolution
When: Unnamed Formation, Quaternary (2.6 - 0.0 Ma)
• 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.
• bed-level stratigraphic resolution
Environment/lithology: coastal; pebbly, shelly/skeletal, conglomeratic, calcareous sandstone
Size class: macrofossils
Collection methods: quarrying,
• Collections made by Vedder et al (1955-1956). Earlier collections by Cooper (1894), and Howard (1955)
Primary reference: 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]more details
Purpose of describing collection: general faunal/floral analysis
PaleoDB collection 37944: authorized by Austin Hendy, entered by Austin Hendy on 27.03.2004
Creative Commons license: CC BY (attribution)
Taxonomic list
Mammalia | |
Ateles squamigerus monkey | |
unclassified | |
Echinoidea | |
Strongylocentrotus cf. franciscanus Agassiz 1863 sea urchin | |
Gastropoda | |
Odostomia cf. oldroydi snail | |
"Bittium eschrichtii" = Neostylidium eschrichtii
"Bittium eschrichtii" = Neostylidium eschrichtii Middendorff 1849 cerith snail Subspecies: Bittium eschrichtii montereyense
| |
Crepidula onyx Sowerby 1824 slipper shell
Crepidula adunca Sowerby 1824 slipper shell | |
"Alvania purpurea" = Alvinia purpurea
"Alvania purpurea" = Alvinia purpurea Dall 1871 snail | |
Amphithalamus cf. tenuis Bartsch 1911 snail | |
"Nassarius cf. perpinguis" = Caesia perpinguis
"Nassarius cf. perpinguis" = Caesia perpinguis Hinds 1844 snail | |
"Olivella biplicata" = Callianax biplicata
"Olivella biplicata" = Callianax biplicata Sowerby 1825 olive snail | |
"Mangelia variegata" = Tenaturris variegata, "Mangelia cf. nitens" = Cythara (Mangelia)
"Mangelia variegata" = Tenaturris variegata Carpenter 1864 snail
"Mangelia cf. nitens" = Cythara (Mangelia) snail | |
"Conus californicus" = Californiconus californicus
"Conus californicus" = Californiconus californicus Reeve 1844 cone shell | |
Pseudomelatoma torosa Gabb 1864 snail | |
"Barbarofusus cf. arnoldi" = Harfordia arnoldi
"Barbarofusus cf. arnoldi" = Harfordia arnoldi Cossmann 1903 snail | |
"Mitra cf. idae" = Mitra (Atrimitra) idae
"Mitra cf. idae" = Mitra (Atrimitra) idae Melville 1893 mitre shell | |
Antisabia panamensis Adams 1852 hoof shell
Hipponix tumens Carpenter 1864 hoof shell | |
"Littorina cf. scutulata" = Littorina (Littorina) scutulata, "Lacuna unifasciata" = Lacuna (Epheria) unifasciata
"Littorina cf. scutulata" = Littorina (Littorina) scutulata Gould 1849 periwinkle
"Lacuna unifasciata" = Lacuna (Epheria) unifasciata Carpenter 1857 periwinkle | |
Petaloconchus complicatus Dall 1908 worm shell | |
"Bittium cf. attenuatum" = Lirobittium attenuatum
"Bittium cf. attenuatum" = Lirobittium attenuatum Carpenter 1864 snail | |
"Daphnella fuscoligata" = Clathromangelia fuscoligata
"Daphnella fuscoligata" = Clathromangelia fuscoligata Dall 1871 snail | |
Acmaea sp. n. sp., Acmaea mitra, "Acmaea digitalis" = Lottia digitalis, "Acmaea ? limatula" = Lottia limatula
Acmaea sp. n. sp. Eschscholtz 1830 limpet
Acmaea mitra Eschscholtz 1833 limpet
"Acmaea digitalis" = Lottia digitalis Eschscholtz 1833 limpet
"Acmaea ? limatula" = Lottia limatula Carpenter 1864 limpet | |
Diodora aspera Rathke 1833 snail | |
"Pupillaria cf. optabilis" = Lirularia optabilis, Calliostoma cf. ligatum, "Tegula brunnea" = Chlorostoma brunnea, "Tegula funebralis" = Chlorostoma funebrale
"Pupillaria cf. optabilis" = Lirularia optabilis Carpenter 1864 top snail
Calliostoma cf. ligatum Gould 1849 top snail
"Tegula brunnea" = Chlorostoma brunnea Philippi 1849 top snail
"Tegula funebralis" = Chlorostoma funebrale Adams 1855 top snail | |
"Tricolia cf. pulloides" = Eulithidium pulloides
"Tricolia cf. pulloides" = Eulithidium pulloides Carpenter 1865 snail | |
"Homalopoma carpenteri" = Homalopoma (Homalopoma) luridum, "Astraea gibberosa" = Pomaulax gibberosa
"Homalopoma carpenteri" = Homalopoma (Homalopoma) luridum Dall 1885 snail
"Astraea gibberosa" = Pomaulax gibberosa Dillwyn 1817 red turban | |
Bivalvia | |
"Glans subquadrata" = Glans carpenteri
"Glans subquadrata" = Glans carpenteri Lamy 1922 clam | |
"Transennella tantilla" = Nutricola tantilla
"Transennella tantilla" = Nutricola tantilla Gould 1853 venus clam | |
Cumingia cf. californica Conrad 1837 clam | |
Bernardina ? bakeri Dall 1910 clam | |
Epilucina californica Conrad 1837 clam | |
Mytilus californianus Conrad 1837 mussel | |
Polyplacophora | |
Mopalia muscosa Gould 1846 chiton | |
Thecostraca | |
Tetraclita ? squamosa Bruguière 1789 green volcano barnacle Subspecies: Tetraclita squamosa rubescens
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