Also known as Head of Las Virgenes Canyon; Locality 4 of Waring 1917; CAS loc. 61667; CAS loc. 61901; CAS loc. 61926; LSJU 4; LSJU loc. 2697

Where: Ventura County, California (34.2° N, 118.7° W)

• Paleocoordinates: 44.0° N, 86.6° W (Wright 2013)

• coordinate estimated from map

When: Las Virgenes Formation, Danian (66.0 - 61.6 Ma)

• Originally described as "Martinez," but now belongs to Santa Susana Formation. Nautilids come from Zinsmeister's (1983) "assemblage A" which spans the lower three-quarters of the Santa Susana. Planktonic foraminifera suggest a P4 and P5 age (Heitman, 1983) and calcareous nannoplankton belong to zones CP5-CP8 (Filewicz & Hill, 1983), indicating a Thanetian age.

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•[Squires 2018] Waring (1917) listed the mollusks found at this locality and referred to them erroneously as ‘Martinez’ species of ‘early Eocene’ age. The type locality of O. plectata plots in upper lower Paleocene (upper Danian Stage) strata mapped as the Las Virgenes Sandstone (Squires, 1981).

Environment/lithology: transition zone or lower shoreface; bioturbated, fine-grained sandstone

Size classes: macrofossils, mesofossils

Collected by H. Hannibal in 3, 1910; reposited in the CAS

• Leland Stanford Junior University Paleontology Collections, eventually transferred to the California Academy of Sciences

Primary reference: C. A. Waring. 1917. Stratigraphic and faunal relations of the Martinez to the Chico and Tejon of Southern California. Proceedings of the California Academy of Sciences 7(4):41-124 [L. Villier/L. Villier]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 193035: authorized by Jonathan Marcot, entered by Jonathan Marcot on 04.05.2018, edited by Austin Hendy

Creative Commons license: CC0 (CC0)