Murrieta (USGS M1476) (Pleistocene of the United States)

Where: Riverside County, California (33.9° N, 117.0° W: paleocoordinates 33.9° N, 116.7° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: "unnamed sandstone" Formation, Irvingtonian (1.8 - 0.3 Ma)

• stratigraphy discussed by Pajak et al. 1996

Environment/lithology: terrestrial; poorly lithified, yellow, calcareous sandstone

• "pale greenish-yellow, medium-grained, friable, caliche-rich sandstones"

Size class: mesofossils

Reposited in the USGS

Collection methods: surface (float)

• "recovered from the surface of a borrow pit" (Pajak et al. 1996)

Primary reference: C. A. Repenning. 1987. Biochronology of the microtine rodents of the United States. M. O. Woodburne (ed.), Cenozoic mammals of North America 236-268 [J. Alroy/M. Sommers/J. Alroy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 20425: authorized by John Alroy, entered by John Alroy on 21.09.1999, edited by Mark Uhen

Creative Commons license: CC BY (attribution)

Taxonomic list

• part of the California Oaks fauna (see other localities)

•"Microtus californicus" was reported erroneously: Pajak et al. 1996

Show authors, comments, and common names
Mammalia
 Proboscidea - Mammutidae
Mammut pacificus1
Mammut pacificus1 Dooley et al. 2019 mastodon
 Rodentia - Cricetidae
Neotoma sp.2, ? Ophiomys parvus2
Neotoma sp.2 Say and Ord 1825 pack rat
same as unnamed species from Irvington
? Ophiomys parvus2 Wilson 1933 vole
1Dooley et al. 2019; 2Pajak, iii et al. 1996