Upper Sespe Creek, unit 4 [Vaqueros Fm] (Miocene of the United States)

Where: Ventura County, California (34.4° N, 119.0° W: paleocoordinates 33.4° N, 112.7° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Vaqueros Formation, Early/Lower Miocene (23.0 - 16.0 Ma)

• LITHOSTRATIGRAPHY: From the Vaqueros Fm, which gradationally overlies the Sespe Fm (Oligocene) and is unconformably overlain by the Monterey Fm (Middle-?Late Miocene). AGE: Early Miocene, on the basis of macrofossil and microfossil biostratigraphy. STRATIGRAPHIC RELATIONS: Representative of the entire formation at this section.

• formation-level stratigraphic resolution

Environment/lithology: coastal; lithified, gray, calcareous siltstone and lithified, gray, calcareous siltstone

• ENVIRONMENT: Not discussed in text, but appears to be shallow marine siliciclastic.
• LITHOLOGY: Gray, calcareous sandstone and siltstone. LITHIFICATION: Lithified, on the basis of facies description.

Size class: macrofossils

Preservation: original calcite

Collected by Dickinson in 1963-1964; reposited in the CAS

Collection methods: surface (in situ),

• COLLECTOR: W.R. Dickinson, 1963-1964. REPOSITORY: Formerly Stanford University, probably now at CAS.

Primary reference: W. R. Dickinson and D. R. Lowe. 1966. Stratigraphic relations of phosphate- and gypsum-bearing Upper Miocene strata, upper Sespe Creek, Ventura County, California. Bulletin of the American Association of Petroleum Geologists 50(11):2464-2481 [A. Hendy/A. Hendy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 94816: authorized by Austin Hendy, entered by Austin Hendy on 24.03.2010

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Limited to representative macrofossils. NOMENCLATURE: Not an authoritative publication with somewhat antiquated nomenclature, and only some species-resolution identifications.
Bivalvia
 Pectinida - Pectinoidae
 Pectinida - Anomiidae
Anomia vaquerosensis Loel and Corey 1932 jingle
 Ostreida - Gryphaeidae
"Ostrea eldridgei" = Pycnodonte (Crenostrea) eldridgei
"Ostrea eldridgei" = Pycnodonte (Crenostrea) eldridgei Arnold 1907 oyster
 Ostreida - Ostreidae
"Ostrea vespertina" = Dendostrea vespertina
"Ostrea vespertina" = Dendostrea vespertina Conrad 1854 oyster
SUBSPECIES: O. vespertina lodi
 Cardiida - Veneridae
Dosinia margaritana Wiedey 1928 venus clam
Gastropoda
 Neogastropoda - Muricidae
Rapana vaquerosensis Arnold 1908 murex snail
 Sorbeoconcha - Turritellidae
Turritella inezana turret shell
SUBSPECIES: T. inezana bicarina
Echinoidea
 Clypeasteroida - Echinarachniidae