UCMP B-2273, San Lorenzo River (Oligocene of the United States)

Where: Santa Cruz County, California (37.2° N, 122.1° W: paleocoordinates 35.6° N, 113.3° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: San Lorenzo Formation, Oligocene (33.9 - 23.0 Ma)

• Stratigraphically 466 feet below top of San Lorenzo formation, 4 feet above stream level, in dark gray, massive siltstone forming vertical wall.

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified siltstone

Size class: macrofossils

Reposited in the UCMP

Primary reference: F. R. Sullivan. 1962. Foraminifera from the type section of the San Lorenzo Formation, Santa Cruz County, California. University of California Publications in Geological Sciences 37(4):233-352 [M. Clapham/M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 185217: authorized by Matthew Clapham, entered by Matthew Clapham on 17.04.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

Anomalinidae
  - Anomalinidae
Anomalina californiensis Cushman and Hobson 1935
Haplophragmiina
 Lituolacea - Lituolidae
Cyclammina clarki Hanna 1923
Cyclammina cf. incisa Stache 1864
 Lituolacea - Discamminidae
 Rotaliina - Cassidulinidae
Cassidulina crassipunctata Cushman and Hobson 1935
Rotaliina
 Planorbulinacea - Cibicididae
Cibicides pseudoungerianus Cushman 1922
ssp. evolutus
 Buliminacea - Buliminidae
Virgulina bramlettei Galloway and Morrey 1929
 Discorbacea - Eponididae
Eponides kleinpelli Cushman and Frizzell 1940
 Rotaliacea - Rotaliidae
Gyroidina orbicularis d'Orbigny 1865
var. planata
Textulariina
 Textulariacea - Valvulinidae
Karreriella barbati Cushman 1936
 Hormosinacea - Hormosinidae
 Textulariina - Prolixoplectidae
Lagenina
 Nodosariacea - Nodosariidae
Nodosaria holserica Schwager 1866
Robulus propinquus Hantken 1873
ssp. cowlitzensis
Robulus warmani Barbat and von Estorff 1933
Robulus arcuatostriatus Hantken 1868
ssp. carolinianus
Marginulina eximia Neugeboren 1851
Plectofrondicularia
  -
Plectofrondicularia packardi Cushman and Schenck 1928
ssp. multilineata