Gypsum Ridge (MCAGCC locality 13) (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

• 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

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

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 28223: authorized by John Alroy, entered by John Alroy on 30.01.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

Gastropoda
 Stylommatophora - Agriolimacidae
Deroceras sp. Rafinesque 1820 slug
slug (!)
Amphibia
 Salientia - Bufonidae
Bufo sp. Laurenti 1768 toad
Mammalia
 Rodentia - Heteromyidae
Dipodomys sp. Gray 1841 kangaroo rat
 Rodentia - Cricetidae
Sigmodon minor Gidley 1922 cotton rat
Paraneotoma sp. Hibbard 1967 pack rat
said to be new
Reithrodontomys sp. Giglioli 1874 harvest mouse
Ondatra idahoensis Wilson 1933 muskrat
 Lagomorpha - Leporidae
Sylvilagus sp. Gray 1867 cottontail rabbit
 Artiodactyla - Camelidae
Hemiauchenia sp. Gervais and Ameghino 1880 camel
Reptilia
 Squamata - Colubridae
Colubridae indet. Oppel 1811 colubrid snake
Actinopteri
 Cypriniformes - Cyprinidae
Cyprinidae indet. Rafinesque 1815 carp-like fish