UCMP B-2274, 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 459 feet below top of San Lorenzo formation, 2 feet above stream level, in dark gray, massive siltstone.

• 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 186038: authorized by Matthew Clapham, entered by Matthew Clapham on 06.06.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

Anomalinidae
  - Anomalinidae
Anomalina californiensis Cushman and Hobson 1935
Haplophragmiina
 Lituolacea - Discamminidae
 Rotaliina - Cassidulinidae
Cassidulina crassipunctata Cushman and Hobson 1935
Cassidulina globosa Hantken 1875
Rotaliina
 Planorbulinacea - Cibicididae
Cibicides pseudoungerianus Cushman 1922
ssp. evolutus
 Buliminacea - Buliminidae
 Rotaliacea - Rotaliidae
Gyroidina orbicularis d'Orbigny 1865
var. planata
 Textulariina - Prolixoplectidae
Lagenina
 Nodosariacea - Nodosariidae
Robulus simplex d'Orbigny 1846
Robulus warmani Barbat and von Estorff 1933
Robulus arcuatostriatus Hantken 1868
ssp. carolinianus
Plectofrondicularia
  -