Where: San Bernardino County, California (34.4° N, 116.2° W: paleocoordinates 34.3° N, 115.9° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Irvingtonian (1.8 - 0.3 Ma)

• section is of reversed polarity

• bed-level stratigraphic resolution

Environment/lithology: alluvial fan; concretionary, micaceous, brown, silty, calcareous sandstone and pebbly conglomerate

Size classes: macrofossils, mesofossils

Primary reference: H. M. Wagner and D. R. Prothero. 2001. Magnetic stratigraphy of the late Pliocene mammal-bearing deposits from Gypsum Ridge, San Bernardino County, California. Magnetic Stratigraphy of the Pacific Coast Cenozoic (D. R. Prothero, ed.) 369-376 [J. Alroy/J. Alroy/J. Alroy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 28221: authorized by John Alroy, entered by John Alroy on 30.01.2003

Creative Commons license: CC BY (attribution)