UC-6128 - Vaqueros Fm (Miocene of the United States)

Where: Orange County, California (33.6° N, 117.6° W: paleocoordinates 32.7° N, 111.4° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

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

• STRATIGRAPHIC RELATIONS: From the Vaqueros Fm, which unconformably overlies the Eocene Tempetate/Martinez Fm, and is overlain by the Temblor Fm (Middle Miocene). THICKNESS: From bed within unit which locally reaches 500 ft in thickness. AGE: Early Miocene on the basis of molluscan biostratigraphy. STRATIGRAPHIC POSITION: From the Turritella inezana zone in the part of the Vaqueros Fm.

• bed-level stratigraphic resolution

Environment/lithology: coastal; poorly lithified, silty sandstone

• ENVIRONMENT: From rather shallow siliciclastic marine facies on the basis of faunal composition.
• SPECIFIC LITHOLOGY: Light colored sandstones and silty sandstones. LITHIFICATION: Poorly lithified on the basis of facies description of adjacent strata and age.

Size class: macrofossils

Reposited in the UCMP

Collection methods: surface (in situ),

• COLLECTOR: W. H. Corey, C. D. Meserve, R. E. Dickerson, and W. S. W. Kew (c. late 1910-20's). REPOSITORY: University of California, Berkeley (UCNMP).

Primary reference: W. Loel and W. H. Corey. 1932. The Vaqueros Formation, Lower Miocene of California (Part 1). University of California Publications, Bulletin of the Department of Geological Sciences 22(3):31-410 [A. Hendy/A. Hendy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 71228: authorized by Austin Hendy, entered by Austin Hendy on 21.04.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for bivalvia and gastropoda, with annelida, bryozoa, crustacea, and pisces also listed. NOMENCLATURE: Antiquated nomenclature, but from authoritative publication with consistent use of species and subgenus-level assignments.
 Sessilia - Balanidae
Balanus sp. Da Costa 1778 barnacle
 Arcida - Arcidae
Arca (Anadara) santana n. sp. Loel and Corey 1932 ark
 Pectinida - Pectinoidae
"Pecten (Lyropecten) bowersi" = Lyropecten, "Pecten (Lyropecten) miguelensis" = Lyropecten miguelensis
"Pecten (Lyropecten) bowersi" = Lyropecten scallop
"Pecten (Lyropecten) miguelensis" = Lyropecten miguelensis Arnold 1906 scallop
SUBSPECIES: P. (L.) miguelensis submiguelensis
 Ostreida - Gryphaeidae
"Ostrea eldridgei" = Pycnodonte (Crenostrea) eldridgei
"Ostrea eldridgei" = Pycnodonte (Crenostrea) eldridgei Arnold 1907 oyster
 Ostreida - Malleidae
 Pholadida - Myidae
? Mya sp. Linnaeus 1758 softshell clam
 Cardiida - Veneridae
"Chione aff. richthofeni" = Chione (Chionopsis) richthofeni Hertlein and Jordan 1927 venus clam
Dosinia santana n. sp. Loel and Corey 1932 venus clam
Saxidomus sp. Conrad 1837 venus clam
Tivela (Pachydesma) inezana Conrad 1849 venus clam
Clementia (Egesta) pertenuis Gabb 1864 venus clam
SUBSPECIES: C. (E.) pertenuis
 Cardiida - Tellinidae
"Metis aff. alta" = Psammotreta (Leporimetis) obesa
"Metis aff. alta" = Psammotreta (Leporimetis) obesa Deshayes 1855 tellin clam
 Cardiida - Cardiidae
"Cardium (Trachycardium) vaquerosensis" = Trachycardium (Trachycardium) vaquerosensis
"Cardium (Trachycardium) vaquerosensis" = Trachycardium (Trachycardium) vaquerosensis Arnold 1908 cockle
 Lucinida - Lucinidae
Lucina wattsi Loel and Corey 1932 clam
 Neogastropoda - Olividae
Olivella santana n. sp. Loel and Corey 1932 olive snail
 Neogastropoda - Volutidae
Voluta sp. Linnaeaus 1758 volute
 Neogastropoda - Muricidae
Rapana vaquerosensis, "Purpura milicentana n. sp." = Ocenebra milicentana
Rapana vaquerosensis Arnold 1908 murex snail
COMMENTS: Includes R. vaquerosensis imperialis
"Purpura milicentana n. sp." = Ocenebra milicentana Loel and Corey 1932 murex snail
 Neogastropoda - Terebridae
Terebra santana n. sp. Loel and Corey 1932 auger snail
 Naticoidea - Naticidae
 Calyptraeoidea - Calyptraeidae
Calyptraea inornata slipper shell
Calyptraea filosa Gabb 1866 slipper shell
Crepidula diminutiva Loel and Corey 1932 slipper shell
 Sorbeoconcha - Turritellidae
Turritella inezana turret shell
COMMENTS: Multiple subspecies
 Sorbeoconcha - Cerithiidae
"Cerithium topangensis" = Bittium topangensis
"Cerithium topangensis" = Bittium topangensis Arnold 1907 cerith snail
 Cheilostomata -
 Clypeasteroida - Scutellidae
Scutella vaquerosensis Kew 1920 sand dollar