Where: Orange County, California (33.8° N, 117.8° W: paleocoordinates 32.8° N, 111.6° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Sespe Formation, Early/Lower Miocene (23.0 - 16.0 Ma)

• LITHOSTRATIGRAPHIC RELATIONS: From undifferentiated Sespe and Vaqueros Fms, which overlie the Santiago Fm (Eocene) and is overlain by the Topanga Fm (Middle Miocene). AGE: Late Eocene-Early Miocene, on the basis of vertebrate and molluscan biostratigraphy and stratigraphic correlations; most macrofossils come from the uppermost part of this undifferentiated unit and are suggested to be Early Miocene in age.

• bed-level stratigraphic resolution

Environment/lithology: coastal; lithified sandstone

Size class: macrofossils

Collected by McKinney; reposited in the USGS

Collection methods: surface (in situ),

• COLLECTORS: D.M. McKinney. REPOSITORY: USGS.

Primary reference: J. E. Schoellhamer, J. G. Vedder, R. F. Yerkes and D. M. Kinney. 1981. Geology of the Northern Santa Ana Mountains, California. United States Geological Survey Professional Paper 420(D):1-109 [J. Alroy/J. Alroy/R. McClees-Funinan]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 94868: authorized by Austin Hendy, entered by Austin Hendy on 31.03.2010

Creative Commons license: CC BY (attribution)