Univ. Cal. Loc. 3207 - Pleito Fm: Early/Lower Oligocene, California

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Gastropoda - Neogastropoda - Olividae
Ancilla fishii (Gabb 1866)
Gastropoda - Neogastropoda - Siphonaliidae
Agasoma gravida (Gabb 1866)
recombined as Bruclarkia gravida
Gastropoda - Naticidae
Natica recluziana (Deshayes 1839)
recombined as Glossaulax reclusiana
Bivalvia - Nuculida - Nuculidae
Acila shumardi (Dall 1909)
recombined as Acila (Truncacila) shumardi
Bivalvia - Nuculanida - Sareptidae
Yoldia cooperi (Gabb 1865)
    = Yoldia cooperii Gabb 1865
Coan et al. 2000
recombined as Yoldia (Portlandia) cooperii
Bivalvia - Cardiida - Veneridae
Antigona undosa Clark 1918
Dosinia mathewsonii Gabb 1869
synonym of Dosinia (Dosinia) whitneyi
Bivalvia - Cardiida - Mactridae
Spisula ramonensis (Packard 1916)
original and current combination Spisula albaria ramonensis
Bivalvia - Cardiida - Tellinidae
Macoma cf. nasuta (Conrad 1837)
Bivalvia - Mytilida - Mytilidae
Mytilus mathewsonii Gabb 1866
recombined as Crenomytilus mathewsoni
Mytilus arnoldi Clark 1918
recombined as Mytilus (Mytilus) arnoldi
Bivalvia - Arcida - Arcidae
Arca sp. Linnaeus 1758
see common names

Geography
Country:United States State/province:California County:Kern
Coordinates: 35.0° North, 119.2° West (view map)
Paleocoordinates:33.4° North, 109.4° West
Basis of coordinate:based on nearby landmark
Geographic resolution:outcrop
Time
Period:Paleogene Epoch:Oligocene
Stage:Rupelian 10 m.y. bin:Cenozoic 4
Key time interval:Early/Lower Oligocene
Age range of interval:33.90000 - 27.82000 m.y. ago
Stratigraphy
Geological group:San Lorenzo Formation:Pleito
Stratigraphic resolution:bed
Stratigraphy comments: STRATIGRAPHIC RELATIONS: From Pleito Fm of the San Lorenzo Group, which unconformably overlies the San Emigdio Fm (Late Eocene), and is unconformably overlain by the Pleito Fm (Early Oligocene) of the San Lorenzo Group. THICKNESS: From bed within unit of formation that reaches 600 ft in thicknes. AGE: Late Eocene on the basis of molluscan biostratigraphy. STRATIGRAPHIC POSITION: From middle unit of the formation.
Lithology and environment
Primary lithology:shelly/skeletal,brown,gray,blue lithified conglomeratic sandstone
Secondary lithology:fine,shelly/skeletal lithified sandstone
Includes fossils?Y
Includes fossils?Y
Lithology description: SPECIFIC LITHOLOGY: Massive dark brown and buff sandstones with fossiliferous layers and light bluish gray massive conglomerates towards base. LITHIFICATION: Presumably lithified on the basis of age.
Environment:coastal indet.
Geology comments: ENVIRONMENT: Presumably shallow marine, siliciclastic assemblage.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:surface (in situ),field collection
Reason for describing collection:biostratigraphic analysis
Museum repositories:UCMP
Collection method comments: COLLECTOR: Presumably C. M. Wagner and K. H. Schilling (1917). REPOSITORY: Univeristy of California Collections of Invertebrate Paleontology, presumably UCMP.
Taxonomic list comments:COVERAGE: Exhaustive for gastropoda, bivalvia, scaphopoda, and cirripedia. NOMENCLATURE: Antiquated nomenclature, but an authoritative publication with species-level assignments.
Metadata
Database number:71195
Authorizer:A. Hendy Enterer:A. Hendy
Research group:marine invertebrate
Created:2007-04-20 22:42:48 Last modified:2013-11-25 13:37:23
Access level:the public Released:2007-04-20 22:42:47
Creative Commons license:CC BY
Reference information

Primary reference:
23848. C. M. Wagner and K. H. Schilling. 1923. The San Lorenzo Group of the San Emigdio region, California. University of California Publications, Bulletin of the Department of Geological Sciences 14(6):235-276 [A. Hendy/A. Hendy/A. Hendy]

Secondary references:

18663 E. V. Coan, P. V. Scott, and F. R. Bernard. 2000. Bivalve seashells of western North America. Santa Barbara Museum of Natural history Monographs 2:1-764 [A. Miller/A. Hendy/M. Uhen]