Upper Cady Mountains (Miocene of the United States)

Where: San Bernardino County, California (34.8° N, 117.0° W: paleocoordinates 34.1° N, 112.7° W)

• coordinate based on political unit

When: Hector Formation, Miocene (23.0 - 5.3 Ma)

Environment/lithology: terrestrial

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

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

Creative Commons license: CC BY (attribution)

Taxonomic list

• 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
Mammalia
 Rodentia - Heteromyidae
Proheteromys sulculus Wilson 1960 rodent
 Rodentia - Castoridae
cf. Anchitheriomys sp. Roger 1885 beaver
 Perissodactyla - Rhinocerotidae
Rhinocerotidae indet.2 Gray 1821 rhinoceros
 Perissodactyla - Equidae
Parapliohippus carrizoensis1 Dougherty 1940 horse
 Carnivora - Canidae
Tomarctus cf. hippophaga Matthew and Cook 1909 bone-crushing dog
"hippophagus"
 Ungulata - Camelidae
Paramiolabis cf. tenuis1 Matthew 1924 camel
cf. Aepycamelus sp. Macdonald 1956 camel
 Ungulata - Antilocapridae
Merycodus sp. Leidy 1854 pronghorn
presumably sensu Frick