Where: San Bernardino County, California (34.8° N, 117.0° W: paleocoordinates 33.9° N, 111.4° W)

• coordinate based on political unit

When: Hector Formation, Hemingfordian (20.4 - 16.0 Ma)

• multiple localities from a 100 m interval outcropping across about 2 km, most of which are about 65 m above an ignimbrite dated at 17.9 +/- 0.3 Ma (K-Ar according to MacFadden et al. 1990)

•in chron C5Cr according to paleomag, which seems reliable based on two KA dates: MacFadden et al. 1990; this spans 16.726 to 17.277 Ma (avg 17.03 Ma): Cande and Kent 1995

• group of beds-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Primary reference: M. O. Woodburne, S. T. Miller, and R. H. Tedford. 1982. Stratigraphy and geochronology of Miocene strata in the central Mojave Desert, California. Geologic excursions in the California deserts and adjacent transverse ranges: fieldtrip guidebook and volume prepared for the joint meeting of the Cordilleran Section--GSA and Pacific Section--AAPG, April 9-11, 2001, Universal City, California : fieldtrips 1-4 47-64 [J. Alroy/J. Alroy/J. Marcot]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 19586: authorized by John Alroy, entered by John Alroy on 05.01.1995

Creative Commons license: CC BY (attribution)