Univ. Cal. Loc. 3183 - San Emigdio Fm (Eocene of the United States)

Where: Kern County, California (35.1° N, 119.2° W: paleocoordinates 34.1° N, 108.2° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: San Emigdio Formation (San Lorenzo Group), Late/Upper Eocene (37.2 - 33.9 Ma)

• STRATIGRAPHIC RELATIONS: From San Emigdio Fm San Lorenzo Group, which unconformably overlies the Meagnos and Tejon Fm's (Early-Middle 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 700 ft in thicknes. AGE: Late Eocene on the basis of molluscan biostratigraphy. STRATIGRAPHIC POSITION: From upper unit of the formation.

• bed-level stratigraphic resolution

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

• ENVIRONMENT: Presumably shallow marine, siliciclastic assemblage.
• SPECIFIC LITHOLOGY: Light brown and bluish gray sandy shales and fine sandstones, carrying dark red fossiliferous layers and lenses. LITHIFICATION: Presumably lithified on the basis of facies description and 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 71167: authorized by Austin Hendy, entered by Austin Hendy on 20.04.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for gastropoda and bivalvia. NOMENCLATURE: Antiquated nomenclature, but an authoritative publication with species-level assignments.
Bivalvia
 Nuculanida - Yoldiidae
Yoldia cooperii Gabb 1865 clam
 Mytilida - Mytilidae
"Mytilus arnoldi" = Mytilus (Mytilus) arnoldi
"Mytilus arnoldi" = Mytilus (Mytilus) arnoldi Clark 1918 mussel
 Solenida - Solenidae
"Solen curtus" = Solena (Plectosolen) conradi Dall 1900 clam
 Cardiida - Cardiidae
Cardium sp. Linnaeus 1758 cockle
 Cardiida - Mactridae
"Spisula ramonensis" = Mactromeris ramonensis, "Spisula packardi" = Pseudocardium packardi
"Spisula ramonensis" = Mactromeris ramonensis Packard and Clark 1915 clam
"Spisula packardi" = Pseudocardium packardi Dickerson 1917 clam
 Cardiida - Veneridae
Antigona undosa, "Antigona mathewsonii" = Amiantis mathewsoni
Antigona undosa Clark 1918 venus clam
"Antigona mathewsonii" = Amiantis mathewsoni Gabb 1866 venus clam
Gastropoda
 Opisthobranchia - Bullidae
 Neogastropoda - Melongenidae
"Perse lincolnensis" = Hemifusus lincolnensis
"Perse lincolnensis" = Hemifusus lincolnensis Winkle 1918 snail
 Neogastropoda - Buccinidae
Siphonalia merriami Wagner and Schilling 1923 true whelk
 Neogastropoda - Fasciolariidae
 Sorbeoconcha - Bursidae
"? Strepsidura lincolnensis" = Olequahia lincolnensis
"? Strepsidura lincolnensis" = Olequahia lincolnensis Weaver 1916 frog shell
 Sorbeoconcha - Naticidae
Natica recluziana Deshayes 1839 moon snail