Alvord Mountain (USGS D301) (Miocene of the United States)
Where: San Bernardino County, California (34.8° N, 117.0° W: paleocoordinates 34.1° N, 112.3° W)
• coordinate based on political unit
• small collection-level geographic resolution
When: Middle Member (Barstow Formation), Barstovian (16.3 - 12.5 Ma)
Environment/lithology: terrestrial
Reposited in the USGS
Primary reference: F. M. Byers, Jr. 1960. Geology of the Alvord Mountain quadrangle, San Bernardino County, California. United States Geological Survey Bulletin 1089-A:1-71 [J. Alroy/J. Alroy/J. Ju]more details
PaleoDB collection 19133: authorized by John Alroy, entered by John Alroy on 19.05.2000
Creative Commons license: CC BY (attribution)
Taxonomic list
• see also Woodburne et al. 1982
tuffs close to this level have been dated at 13.8 and 14.0 Ma (K-Ar); redated at 14.4 +/- 0.03 Ma (AA on plagioclase and biotite) by Woodburne 1991b
tuffs close to this level have been dated at 13.8 and 14.0 Ma (K-Ar); redated at 14.4 +/- 0.03 Ma (AA on plagioclase and biotite) by Woodburne 1991b
Show authors, comments, and common names
| Mammalia | |
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Brachypsalis cf. pachycephalus Cope 1890 mustelid carnivore | |
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Merycodus sp. Leidy 1854 pronghorn presumably sensu Frick, but omitted by Woodburne 1991b, who does mention Merycodus from "other" localities in the Middle Mbr.
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Protolabis barstowensis n. sp.
Protolabis barstowensis n. sp. Lewis 1968 camel | |
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Acritohippus cf. stylodontus Merriam 1919 horse | |