OCPC Loc. 2606, Fletcher Jones site: Late/Upper Pleistocene, California

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Echinoidea - Clypeasteroida - Dendrasteridae
Dendraster excentricus (Eschscholz 1826)
Gastropoda - Trochidae
Norrisia norrisi (Sowerby I 1838)
recombined as Norrisia norrisii
Tegula gallina (Forbes 1850)
recombined as Chlorostoma gallina
Gastropoda - Tegulidae
Tegula eiseni Jordan 1936
recombined as Agathistoma eiseni
Gastropoda - Potamididae
Cerithidea californica (Haldeman 1840)
2 specimens
recombined as Cerithideopsis californica
Gastropoda - Neotaenioglossa - Calyptraeidae
Crucibulum spinosum Conrad 1855
7 specimens
Gastropoda - Naticidae
Neverita reclusianus (Deshayes 1839)
11 specimens
recombined as Glossaulax reclusiana
Gastropoda - Neogastropoda - Conidae
Conus californicus Reeve 1844
1 specimen
recombined as Californiconus californicus
Gastropoda - Bursidae
Crossata californica (Hinds 1843)
synonym of Crossata ventricosa
Bivalvia - Pectinida - Pectinidae
Euvola vogdesi (Arnold 1906)
2 specimens
Argopecten ventricosus (Sowerby 1842)
14 specimens
Bivalvia - Pectinida - Anomiidae
Anomia peruviana d'Orbigny 1846
12 specimens
Bivalvia - Ostreida - Ostreidae
Ostrea conchaphila Carpenter 1857
6 specimens
Bivalvia - Cardiida - Cardiidae
Trachycardium cf. panamense (Sowerby I 1833)
7 specimens
synonym of Mexicardia procera
Bivalvia - Cardiida - Semelidae
Semele venusta (Reeve 1853)
1 specimen
recombined as Semele (Amphidesma) venusta
Bivalvia - Cardiida - Donacidae
Donax gouldi (Dall 1921)
11 specimens
recombined as Donax (Donax) gouldii
Donax californicus Conrad 1837
3 specimens
recombined as Donax (Paradonax) californicus
Bivalvia - Cardiida - Solecurtidae
Tagelus sp. Gray 1847
2 specimens
Tagelus californianus (Conrad 1837)
3 specimens
recombined as Tagelus (Tagelus) californianus
Bivalvia - Cardiida - Tellinidae
Macoma cf. carlottensis Whiteaves 1880
2 specimens
recombined as Psammacoma carlottensis
Bivalvia - Cardiida - Ungulinidae
Diplodonta sericata (Reeve 1850)
15 specimens
recombined as Diplodonta (Felaniella) sericata
Bivalvia - Cardiida - Chamidae
Pseudochama exogyra (Conrad 1837)
3 specimens
original and current combination Chama exogyra
Chama arcana Bernard 1976
Bivalvia - Cardiida - Veneridae
Chione sp. von Mühlfield 1811
1 specimen
Chione undatella (Sowerby I 1835)
7 specimens
Chione californiensis (Broderip and Sowerby I 1835)
25 specimens
Dosinia ponderosa (Gray 1838)
1 specimen
Chione fluctifraga (Sowerby 1853)
1 specimen
recombined as Chionista fluctifraga
Chione cortezi (Carpenter 1864)
20 specimens
synonym of Chionista fluctifraga
Chione gnidia (Broderip and Sowerby I 1829)
23 specimens
recombined as Chionopsis gnidia
Petricolaria cognata (Adams 1852)
2 specimens
Megapitaria squalida (Sowerby 1833)
1 specimen
Bivalvia - Cardiida - Mactridae
Mactridae indet. Lamarck 1809
Bivalvia - Lucinida - Lucinidae
Lucinisca nuttalli (Conrad 1837)
5 specimens
Bivalvia - Carditida - Crassatellidae
Crassinella pacifica (Adams 1852)
2 specimens
Crassinella nuculiformis Berry 1940
1 specimen
Malacostraca - Decapoda
Decapoda indet. Latreille 1802
10 specimens
Thecostraca - Balanomorpha - Balanidae
? Balanus sp. Da Costa 1778
12 specimens
see common names

Geography
Country:United States State/province:California County:Orange
Coordinates: 33.6° North, 117.9° West (view map)
Paleocoordinates:33.6° North, 117.9° West
Basis of coordinate:estimated from map
Geographic resolution:outcrop
Time
Period:Quaternary Epoch:Pleistocene
Stage:Late/Upper Pleistocene 10 m.y. bin:Cenozoic 6
Key time interval:Late/Upper Pleistocene
Age range of interval:0.12900 - 0.01170 m.y. ago
Age estimate:122 Ka (U/Pb)
Stratigraphy
Stratigraphic resolution:bed
Stratigraphy comments: 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.
Lithology and environment
Primary lithology:"cross stratification" unlithified sandstone
Secondary lithology: poorly lithified silty mudstone
Includes fossils?Y
Includes fossils?Y
Lithology description: 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.
Environment:coastal indet.
Geology comments: ENVIRONMENT: Mixed thanatocoenosis, incl. representatives from protected bay, sandy-bottom and rocky-bottom, protected to open coasts, and offshore environments.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils,mesofossils
Collection methods and comments
Collection methods:bulk,sieve,field collection
Reason for describing collection:paleoecologic analysis
Collection method comments: COLLECTOR; Powell et al. REPOSITORY: Orange Co. Paleontology Collections.
Taxonomic list comments:COVERAGE: Exhaustive for molluscs, other invertebrate taxa also included. NOMENCLATURE: Not an authoritative publication, but with modern nomenclature, and species-resolution identifications.
Metadata
Database number:96939
Authorizer:A. Hendy Enterer:A. Hendy
Research group:marine invertebrate
Created:2010-07-13 08:06:12 Last modified:2013-11-25 13:37:23
Access level:the public Released:2010-07-13 08:06:12
Creative Commons license:CC BY
Reference information

Primary reference:
33094. 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]