Gypsum Ridge (MCAGCC localities 7 and 14) (Pleistocene of the United States)

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

• coordinate based on nearby landmark

• outcrop-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

• "locally calcareous concretionary, brown, micaceous silty sandstones and pebbly conglomerates"

Size class: macrofossils

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 28222: authorized by John Alroy, entered by John Alroy on 30.01.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

 Testudines - Pantestudinidae
Hesperotestudo sp. Williams 1950 turtle
 Gruiformes - Rallidae
Rallus sp. Linnaeus 1758 rail
 Perissodactyla - Equidae
Equus sp. Linnaeus 1758 horse