Live Oak Canyon (Eocene of the United States)

Where: Orange County, California (34.7° N, 117.8° W: paleocoordinates 34.2° N, 105.8° W)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Tejon Formation, Bartonian (41.3 - 38.0 Ma)

• From upper Tejon Formation, and most likely from "Tejon" stage, or possibly the "Transition" stage. Therefore a upper Middle Eocene=Narizian=Bartonian age is assigned to the collection, although it is possibly as old as Lutetian. The Tejon Formation unconformably overlies basement, and is unconformably overlain by the Tecuya Formation (Oligocene) in this section. It is not specified which of three members this collection is from.

• formation-level stratigraphic resolution

Environment/lithology: coastal; lithified sandstone

• Collections from this section are generally typical of sandy level bottom communities, and somewhat greater depths than the inner sublittoral zone (low tide to around 90 m).
• While this collection is not specifically placed in measured section, all other collections are derived from marine sandstones. Appears to be mostly lithified from photos in publication. No detailed lithology or lithification comments mentioned in text.

Size class: macrofossils

Reposited in the USGS

Collection methods: quarrying,

• Collected by T.H. Nilson and W.O. Addicott. Collections likely to be reposited at USGS Menlo Park or USNM (not specified).

Primary reference: L. R. Saul and R. L. Squires. 2008. Cretaceous trichotropid gastropods from the Pacific slope of North America: Possible pathways to calyptraeid morphology. The Nautilus 122(3):115-142 [P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 177882: authorized by Pete Wagner, entered by Pete Wagner on 11.04.2016

Creative Commons license: CC BY (attribution)

Taxonomic list

• Identified by W.O. Addicott.
Gastropoda
 Neotaenioglossa - Trichotropidae
Spirocrypta pileum Gabb 1864 snail