Location #67-36 - Southeast coast of 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 above San Miguel Intrsuives = lower Saucezian. Saucezian = late Oligocene-earliest Miocene.

• bed-level stratigraphic resolution

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

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

Size class: macrofossils

Collection methods: quarrying,

• Collected by Avila and Weaver (1967). 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 52406: 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.
Show authors, comments, and common names
Gastropoda
 Cerithioidea - Turritellidae
Turritella inezana, Turritella ocoyana, Turritella cf. ocoyana
Turritella inezana Conrad 1857 turret shell
Turritella ocoyana Conrad 1855 turret shell
Turritella cf. ocoyana Conrad 1855 turret shell
Subspecies: Turritella ocoyana topangaensis
 Neogastropoda - Muricidae
"Rapana vaquerosensis" = Califrapana vaquerosensis
"Rapana vaquerosensis" = Califrapana vaquerosensis Arnold 1908 murex snail
 Neogastropoda - Conidae
Conus sp.
Conus sp. Linnaeus 1758 cone shell
Bivalvia
 Ostreida - Ostreidae
Ostrea sp.
Ostrea sp. Linnaeus 1758 oyster
 Cardiida - Solecurtidae
Tagelus ? clarki
Tagelus ? clarki Loel and Corey 1932 clam