U.C.L.A. Loc. 5780, Elsmere Canyon [Towsley Fm] (Pliocene of the United States)

Where: Los Angeles County, California (34.4° N, 118.5° W: paleocoordinates 34.1° N, 117.2° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

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

• STRATIGRAPHIC RELATIONS: From the Towsley Fm, which unconformably overlies Eocene strata, and is overlain by the Pico Fm (Pliocene). AGE: Early Pliocene, on the basis of macrofossil biostratigraphy. STRATIGRAPHIC POSITION: From very small lense of Conglomeratic siltstone in sandstone-conglomerate tongue from about 60 ft below contact with Pico Fm.

• bed-level stratigraphic resolution

Environment/lithology: coastal; poorly lithified, conglomeratic siltstone

• SPECIFIC LITHOLOGY: Conglomeratic siltstone. LITHIFICATION: Variably lithified.

Size class: macrofossils

Collected by Kern

Collection methods: bulk, surface (in situ),

• COLLECTOR: J.P. Kern, c. 1970's. REPOSITORY: UCLA, California.

Primary reference: J. P. Kern. 1973. Early Pliocene marine climate and environment of the eastern Ventura Basin, Southern California. University of California Publications in Geological Sciences 96:1-117 [A. Hendy/A. Hendy/A. Hendy]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 97403: authorized by Austin Hendy, entered by Austin Hendy on 25.07.2010

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for molluscs. NOMENCLATURE: An authoritative publication, with somewhat antiquated nomenclature, but with species-resolution identifications.
Bivalvia
 Cardiida - Cardiidae
"Nemocardium centifilosum" = Nemocardium (Keenaea) centifilosum, "Trachycardium quadragenarium" = Dallocardia quadragenarium
"Nemocardium centifilosum" = Nemocardium (Keenaea) centifilosum Carpenter 1864 cockle
"Trachycardium quadragenarium" = Dallocardia quadragenarium Conrad 1837 cockle
 Cardiida - Veneridae
"Chione (Anomalocardia) fernandoensis" = Chione (Securella) securis fernandoensis
"Chione (Anomalocardia) fernandoensis" = Chione (Securella) securis fernandoensis English 1914 venus clam
Gastropoda
 Opisthobranchia - Cylichnidae
Acteocina aff. culcitella Gould 1853 barrel-bubble
 Trochoidea - Turbinidae
"Margarites pupillus" = Pupillaria pupilla, Astraea gradata
"Margarites pupillus" = Pupillaria pupilla Gould 1849 snail
Astraea gradata Grant and Gale 1931 snail
 Neotaenioglossa - Calyptraeidae
Crepidula adunca Sowerby 1824 slipper shell
Calyptraea filosa Gabb 1866 slipper shell
 Neogastropoda - Nassariidae
"Nassarius stocki" = Nassarius (Catilon) stocki
"Nassarius stocki" = Nassarius (Catilon) stocki Kanakoff 1956 snail
 Neogastropoda - Columbellidae
Mitrella cf. gausapata Gould 1850 snail
 Neogastropoda - Siphonaliidae
Calicantharus humerosus Gabb 1869 snail
 Neogastropoda - Conidae
"Conus californicus" = Californiconus californicus
"Conus californicus" = Californiconus californicus Reeve 1844 cone shell
 Neogastropoda - Turridae
Megasurcula carpenteriana Gabb 1866 turrid
 Sorbeoconcha - Littorinidae
Littorina sp. Ferussac 1821 periwinkle
Lacuna sp. Turton 1827 periwinkle
 Sorbeoconcha - Naticidae
"Neverita reclusiana" = Glossaulax reclusiana
"Neverita reclusiana" = Glossaulax reclusiana Deshayes 1839 moon snail
 Sorbeoconcha - Procerithiidae
"Bittium cf. rugatum" = Lirobittium rugatum
"Bittium cf. rugatum" = Lirobittium rugatum Carpenter 1866 snail
 Cerithioidea - Turritellidae
Turritella cooperi Carpenter 1864 turret shell