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
Anomalina californiensis Cushman and Hobson 1935
 Lituolacea - Lituolidae
Cyclammina clarki Hanna 1923
Cyclammina cf. incisa Stache 1864
 Lituolacea - Discamminidae
 Rotaliina - Cassidulinidae
Cassidulina crassipunctata Cushman and Hobson 1935
 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
 Textulariacea - Valvulinidae
Karreriella barbati Cushman 1936
 Hormosinacea - Hormosinidae
 Textulariina - Prolixoplectidae
 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 packardi Cushman and Schenck 1928
ssp. multilineata