Location #64-8P - SE Central Santa Rosa Island (Rincon Fm) (Oligocene of the United States)

Where: Santa Barbara County, California (34.7° N, 120.3° W: paleocoordinates 33.3° N, 112.1° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Lower Member (Rincon Formation), Chattian (28.1 - 23.0 Ma)

• From lower Rincon Formation = upper Zemorian. Zemorian=middle to late Oligocene.

• bed-level stratigraphic resolution

Environment/lithology: offshore; lithified, black, brown, gray mudstone

• Offshore siliciclastic environment.
• Highly fractured dark brown, gray, to black weathering mudstone and siltstone.

Size class: macrofossils

Collection methods: quarrying,

• Collected by Avila and Weaver (1964). Not sure of any repositories.

Primary reference: D. E. Weaver. 1969. Geology of the Northern Channel Islands. American Association of Petroleum Geologists - Pacific Section [A. Miller/A. Hendy/A. Hendy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 52391: authorized by Austin Hendy, entered by Austin Hendy on 04.08.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

• Nomenclature appears reasonable. Unsure of identifier.
Gastropoda
 Sorbeoconcha - Turritellidae
Turritella inezana turret shell
Turritella temblorensis Wiedey 1928 turret shell
Subspecies: Turritella temblorensis tritschi