USGS 6847 - Alverso Cañon [Imperial Fm] (Pliocene of the United States)

Where: Imperial County, California (32.8° N, 116.0° W: paleocoordinates 32.6° N, 114.8° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Early/Lower Pliocene (5.3 - 3.6 Ma)

• STRATIGRAPHIC RELATIONS: From the Imperial Formation, for which lithostratigraphic relationships are not discussed. AGE: Early Pliocene, based on existing (more recent) collections. STRATIGRAPHIC POSITION: From unknown position within formation.

• bed-level stratigraphic resolution

Environment/lithology: marine; poorly lithified sandstone

• SPECIFIC LITHOLOGY: Fossil collections generally originate from sandstone layers. LITHIFICATION: Unknown.

Size class: macrofossils

Collected by Bowers & Mendenhall in 1904; reposited in the USGS

Collection methods: bulk,

• COLLECTORS: S. Bowers and W.C. Mendenhall, 1904. REPOSITORY: USGS.

Primary reference: G. D. Hanna. 1926. Paleontology of Coyote Mountain, Imperial County, California. Proceedings of the California Academy of Sciences 14(18):427-503 [A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 96543: authorized by Austin Hendy, entered by Austin Hendy on 11.06.2010

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for molluscs. NOMENCLATURE: Authoritative publication, with antiquated nomenclature, and species-resolution identifications.
Show authors, comments, and common names
Gastropoda
 Neritoidea - Neritidae
Neritina picta
Neritina picta Sowerby 1832 snail
 Sorbeoconcha - Tonnidae
Malea ringens
Malea ringens Swainson 1822 tun shell
 Neogastropoda - Conidae
Conus regularis
Conus regularis Sowerby 1841 cone shell
 Neogastropoda - Turridae
"Pleurotoma barretti" = Polystira barretti
"Pleurotoma barretti" = Polystira barretti Guppy 1866 turrid
 Neogastropoda - Olividae
Oliva spicata
Oliva spicata Durham 1950 olive snail
 Neogastropoda - Turbinellidae
Vasum caestum
 Sorbeoconcha - Strombidae
"Strombus obliteratus" = Persististrombus obliteratus
"Strombus obliteratus" = Persististrombus obliteratus Hanna 1926 true conch
 Sorbeoconcha - Naticidae
"Natica uber" = Polinices uber, "Natica unifasciata" = Natica (Naticarius) unifasciata
"Natica uber" = Polinices uber Valenciennes 1821 moon snail
"Natica unifasciata" = Natica (Naticarius) unifasciata Lamarck 1822 moon snail
 Cerithioidea - Modulidae
Modulus unidens
 Cerithioidea - Turritellidae
Turritella imperialis
Turritella imperialis Hanna 1926 turret shell
 Opisthobranchia - Bullidae
"Bullaria striata" = Bulla striata
"Bullaria striata" = Bulla striata Bruguiére 1792 snail
 Heterostropha - Architectonicidae
"Architectonica quadriceps" = Architectonica nobilis
"Architectonica quadriceps" = Architectonica nobilis Röding 1798 sundial
Bivalvia
 Ostreida - Ostreidae
"Ostrea vespertina" = Dendostrea vespertina
"Ostrea vespertina" = Dendostrea vespertina Conrad 1855 oyster
 Pectinida - Pectinoidae
"Pecten keepi" = Euvola keepi, "Pecten carrizoensis" = Flabellipecten carrizoensis
"Pecten keepi" = Euvola keepi Arnold 1906 scallop
"Pecten carrizoensis" = Flabellipecten carrizoensis Arnold 1906 scallop
 Cardiida - Solecurtidae
"Tagelus californianus" = Tagelus (Tagelus) californianus
"Tagelus californianus" = Tagelus (Tagelus) californianus Conrad 1837 clam
 Pholadida - Pholadidae
Barnea costata
 Lucinida - Lucinidae
Codakia colpoica, "Lucina edentuloides" = Pegophysema edentuloides, "Divaricella eburnea" = Divalinga eburnea
Codakia colpoica Dall 1901 clam
"Lucina edentuloides" = Pegophysema edentuloides Verrill 1901 clam
"Divaricella eburnea" = Divalinga eburnea Reeve 1850 clam