UCMP B-2277, 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: Vaqueros Formation, Oligocene (33.9 - 23.0 Ma)

• Stratigraphically 160 feet above base of Vaqueros formation, 6 feet above road and behind telegraph pole, in prominent 1-foot, dark gray, massive siltstone bed.

• 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 185214: authorized by Matthew Clapham, entered by Matthew Clapham on 16.04.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

  - Anomalinidae
Anomalina californiensis Cushman and Hobson 1935
  - Ellipsoidinidae
Ellipsonodosaria recta Palmer and Bermudez 1936
 Lituolacea - Haplophragmoiidae
 Lituolacea - Lituolidae
Cyclammina clarki Hanna 1923
 Planorbulinacea - Cibicididae
Cibicides pseudoungerianus Cushman 1922
ssp. evolutus
 Buliminacea - Uvigerinidae
Hopkinsina compressa Cushman 1925
 Buliminacea - Buliminidae
Bulimina rinconensis Cushman and Laiming 1931
Bulimina cf. socialis Bornemann 1855
 Discorbacea - Eponididae
Eponides keenani Cushman and Kleinpell 1934
 Rotaliacea - Rotaliidae
Gyroidina condoni Cushman and Schenck 1928
Gyroidina orbicularis d'Orbigny 1865
 Rotaliina -
Angulogerina sp. Williamson 1858
 Astrorhizacea - Bathysiphonidae
Bathysiphon sanctaecrucis Cushman and Kleinpell 1934
 Textulariacea - Valvulinidae
Dorothia californica Cushman and Kleinpell 1934
 Nodosariacea - Nodosariidae
Darbyella sp. Howe and Wallace 1932
Dentalina sp. d'Orbigny 1826
Dentalina quadrulata Cushman and Laiming 1931