OCPC Loc. 2602, Fletcher Jones site (Pleistocene of the United States)

Where: Orange County, California (33.6° N, 117.9° W: paleocoordinates 33.6° N, 117.9° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Late/Upper Pleistocene (0.1 - 0.0 Ma)

• STRATIGRAPHIC RELATIONS: From unnamed terrace deposits that overly the Niguel Fm (Late Pleistocene) AGE: Late Pleistocene, on the basis of geochemical dating. Uranium series dating (Grant et al., 1999) of a solitary coral from a nearby correlated locality gave an age of 122,000, giving the Fletcher Jones site an approximate age range of 120-125 Ka. STRATIGRAPHIC POSITION: From terrace deposits 2-2.5 m above an unconformity with the Niguel Fm.

• bed-level stratigraphic resolution

Environment/lithology: coastal; unlithified sandstone and poorly lithified, silty mudstone

• ENVIRONMENT: Mixed thanatocoenosis, incl. representatives from protected bay, sandy-bottom and rocky-bottom, protected to open coasts, and offshore environments.
• SPECIFIC LITHOLOGY: Grades from a silty mudstone to a cross-bedded moderately well-sorted, unconsolidated sand. LITHIFICATION: Unlithified, on the basis of facies description and sample preparation.

Size classes: macrofossils, mesofossils

Collection methods: bulk, sieve,

• COLLECTOR; Powell et al. REPOSITORY: Orange Co. Paleontology Collections.

Primary reference: C. L. Powell II, L. B. Grant, and S. W. Conkling. 2005. Paleoecologic analysis and age of a late Pleistocene fossil assemblage from Upper Newport Bay, Newport Beach, Orange County, California. The Veliger 47(3):183-192 [A. Hendy/A. Hendy]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 96935: authorized by Austin Hendy, entered by Austin Hendy on 13.07.2010

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for molluscs, other invertebrate taxa also included. NOMENCLATURE: Not an authoritative publication, but with modern nomenclature, and species-resolution identifications.
Echinoidea
 Clypeasteroida - Dendrasteridae
Dendraster excentricus Eschscholz 1826 sand dollar
Thecostraca
 Balanomorpha - Balanidae
? Balanus sp. Da Costa 1778 barnacle
Gastropoda
 Sorbeoconcha - Naticidae
"Neverita reclusianus" = Glossaulax reclusiana
"Neverita reclusianus" = Glossaulax reclusiana Deshayes 1839 moon snail
 Neogastropoda - Nassariidae
Nassariidae indet. Iredale 1916 snail
Bivalvia
 Nuculida - Nuculidae
"Nucula exigua" = Nucula (Lamellinucula) exigua Sowerby 1833 nut clam
 Pectinida - Anomiidae
Anomia peruviana d'Orbigny 1846 jingle
 Pectinida - Pectinoidae
Argopecten ventricosus Sowerby 1842 calico scallop
 Lucinida - Lucinidae
Lucinisca nuttalli Conrad 1837 clam
 Cardiida - Cardiidae
"Trachycardium cf. panamense" = Mexicardia procera
"Trachycardium cf. panamense" = Mexicardia procera Sowerby 1833 cockle
 Cardiida - Tellinidae
"Tellina meropsis" = Tampaella meropsis
"Tellina meropsis" = Tampaella meropsis Dall 1900 tellin clam
 Cardiida - Donacidae
"Donax gouldi" = Donax (Donax) gouldii
"Donax gouldi" = Donax (Donax) gouldii Dall 1921 clam
 Cardiida - Veneridae
Petricolaria cognata Adams 1852 venus clam
"Chione gnidia" = Chionopsis gnidia Broderip and Sowerby I 1829 venus clam
Chione sp. von Mühlfield 1811 venus clam
Chione californiensis Broderip and Sowerby I 1835 venus clam
Chione undatella Sowerby I 1835 venus clam
"Chione fluctifraga" = Chionista fluctifraga Sowerby 1853 venus clam
"Chione cortezi" = Chionista fluctifraga Sowerby 1853 venus clam
 Cardiida - Ungulinidae
"Diplodonta sericata" = Diplodonta (Felaniella) sericata
"Diplodonta sericata" = Diplodonta (Felaniella) sericata Reeve 1850 clam
 Carditida - Crassatellidae
Crassinella nuculiformis Berry 1940 clam
Crassinella pacifica Adams 1852 clam