CIT Loc. 990 (Pleistocene of the United States)

Where: Los Angeles County, California (33.7° N, 118.3° W: paleocoordinates 33.7° N, 118.3° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Timms Point Silt Formation, Middle Pleistocene (0.8 - 0.1 Ma)

• LITHOSTRATIGRAPHY: From "Timms Point beds", which locally overly Miocene shale. AGE: Pleistocene, following Clark (1931), but edited to middle Pleistocene by enterer on the basis of established modern age control. STRATIGRAPHIC DETAILS: 30 ft stratigraphically above bed no. 2. Thyasira disjuncts abundant here.

• bed-level stratigraphic resolution

Environment/lithology: offshore; unlithified siltstone

• ENVIRONMENT: fauna is characteristic of offshore soft-bottom settings.
• LITHOLOGY: shale. LITHIFICATION: not reported in text, but fossils in LACMIP collection from these localities are unlithified.

Size classes: macrofossils, mesofossils

Preservation: original aragonite, original calcite

Reposited in the CIT, LACM

Collection methods: bulk, surface (float), surface (in situ),

• COLLECTOR: unknown. REPOSITORY: LACMIP, including former CIT collections.

Primary reference: A. Clark. 1931. The cool-water Timms Point Pleistocene horizon at San Pedro, California. Transactions of the San Diego Society of Natural History 7:25-42 [A. Hendy/A. Hendy]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 202643: authorized by Austin Hendy, entered by Austin Hendy on 16.07.2019

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for invertebrates. NOMENCLATURE: Antiquated, but mostly with species-resolution identifications.
Bivalvia
 Pectinida - Pectinoidae
""Pecten" caurinus" = Patinopecten caurinus
""Pecten" caurinus" = Patinopecten caurinus Gould 1850 scallop
 Cardiida - Tellinidae
"Macoma calcarea" = Macoma (Macoma) calcarea
"Macoma calcarea" = Macoma (Macoma) calcarea Gmelin 1792 tellin clam
 Cardiida - Veneridae
"Venerella subdiaphana" = Compsomyax subdiaphana
"Venerella subdiaphana" = Compsomyax subdiaphana Carpenter 1864 venus clam
 Thraciida - Thraciidae
"Thracia trapezoides" = Thracia (Homoeodesma) trapezoides
"Thracia trapezoides" = Thracia (Homoeodesma) trapezoides Conrad 1849 clam
 Lucinida - Thyasiridae
"Thyasira disjuncta" = Conchocele bisecta
"Thyasira disjuncta" = Conchocele bisecta Conrad 1849 clam
 Lucinida - Lucinidae
"Lucina annulata" = Lucinoma annulatum
"Lucina annulata" = Lucinoma annulatum Reeve 1850 clam
 Carditida - Carditidae
"Cardita ventricosa" = Coanicardita ventricosa
"Cardita ventricosa" = Coanicardita ventricosa Gould 1850 clam
Gastropoda
 Neogastropoda - Olividae
"Olivella biplicata" = Callianax biplicata
"Olivella biplicata" = Callianax biplicata Sowerby 1825 olive snail
 Neogastropoda - Buccinidae
"Neptunea tabulata" = Neptunea (Sulcosipho) tabulata
"Neptunea tabulata" = Neptunea (Sulcosipho) tabulata Baird 1863 true whelk
 Cerithioidea - Cerithiidae
Bittium sp. Gray 1847 cerith snail