Univ. Cal. Loc. 3216 - Pleito Fm (Oligocene of the United States)

Where: Kern County, California (35.0° N, 119.2° W)

• Paleocoordinates: 38.7° N, 104.2° W (Wright 2013)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Pleito Formation (San Lorenzo Group), Early/Lower Oligocene (33.9 - 28.4 Ma)

• 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.

• bed-level stratigraphic resolution

Environment/lithology: coastal; lithified, shelly/skeletal, brown, gray, blue, conglomeratic sandstone and lithified, fine-grained, shelly/skeletal sandstone

• ENVIRONMENT: Presumably shallow marine, siliciclastic assemblage.
• 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.

Size class: macrofossils

Reposited in the UCMP

Collection methods: surface (in situ),

• COLLECTOR: Presumably C. M. Wagner and K. H. Schilling (1917). REPOSITORY: Univeristy of California Collections of Invertebrate Paleontology, presumably UCMP.

Primary reference: 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]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 71197: authorized by Austin Hendy, entered by Austin Hendy on 20.04.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for gastropoda, bivalvia, scaphopoda, and cirripedia. NOMENCLATURE: Antiquated nomenclature, but an authoritative publication with species-level assignments.
Gastropoda
 Neogastropoda - Fasciolariidae
Fusinus hecoxi Arnold 1908 snail
 Neogastropoda - Siphonaliidae
"Agasoma gravida" = Bruclarkia gravida
"Agasoma gravida" = Bruclarkia gravida Gabb 1866 snail
 Neogastropoda - Buccinidae
Agasoma acuminatum Anderson and Martin 1914 true whelk
 Sorbeoconcha - Ficidae
"Ficus pyriformis" = Ficus modesta
"Ficus pyriformis" = Ficus modesta Conrad 1848 fig shell
 Sorbeoconcha - Naticidae
Natica recluziana Deshayes 1839 moon snail
Bivalvia
 Cardiida - Tellinidae
Tellina eugenia Dall 1909 tellin clam
 Cardiida - Mactridae
"Spisula ramonensis" = Mactromeris ramonensis
"Spisula ramonensis" = Mactromeris ramonensis Packard 1916 clam
 Cardiida - Veneridae
"Chione cf. lineolata" = Securella cryptolineata, "Dosinia mathewsonii" = Dosinia (Dosinia) whitneyi
"Chione cf. lineolata" = Securella cryptolineata Clark 1918 venus clam
"Dosinia mathewsonii" = Dosinia (Dosinia) whitneyi Gabb 1866 venus clam
 Hiatellida - Hiatellidae
"Panopea aff. estrellana" = Panopea abrupta
"Panopea aff. estrellana" = Panopea abrupta Conrad 1849 clam
 Lucinida - Lucinidae
"Phacoides aff. acutilineatus" = Lucinoma acutilineata
"Phacoides aff. acutilineatus" = Lucinoma acutilineata Conrad 1849 clam
Scaphopoda
 Dentaliida - Dentaliidae
Dentalium sp. Linnaeus 1758 tusk shell