UC-A529 - Vaqueros Fm (Miocene of the United States)

Where: Orange County, California (33.5° N, 117.8° W: paleocoordinates 32.6° N, 111.5° 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 upper 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. Loel, W. H. Corey, and A. M. Strong (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 71216: 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
 Pectinida - Pectinoidae
"Pecten (Lyropecten) miguelensis" = Lyropecten miguelensis
"Pecten (Lyropecten) miguelensis" = Lyropecten miguelensis Arnold 1906 scallop
SUBSPECIES: P. (L.) miguelensis submiguelensis
 Cardiida - Ungulinidae
Diplodonta cf. orbella Gould 1851 clam
 Cardiida - Veneridae
Dosinia (Dosinidia) margaritana Wiedey 1928 venus clam
SUBSPECIES: D. (Dosinidia) margaritana projecta
Dosinia (Dosinella) merriami Clark 1915 venus clam
Tivela (Pachydesma) inezana Conrad 1849 venus clam
Clementia (Egesta) pertenuis Gabb 1864 venus clam
 Cardiida - Donacidae
? Donax sp. Linnaeus 1758 clam
 Lucinida - Lucinidae
"Phacoides (Here) richthofeni" = Here excavata, "Phacoides (Lucinoma) acutilineatus" = Lucinoma acutilineata
"Phacoides (Here) richthofeni" = Here excavata Carpenter 1857 clam
"Phacoides (Lucinoma) acutilineatus" = Lucinoma acutilineata Conrad 1849 clam
 Naticoidea - Naticidae
"Polinices recluzianus" = Glossaulax reclusiana
"Polinices recluzianus" = Glossaulax reclusiana Deshayes 1841 moon snail
SUBSPECIES: P. recluzianus andersoni
 Calyptraeoidea - Calyptraeidae
Crepidula cf. praerupta Conrad 1849 slipper shell
 Sorbeoconcha - Turritellidae
Turritella inezana turret shell