Coal Valley (UCMP V-4707) (Miocene of the United States)
Where: Mineral County, Nevada (38.5° N, 118.3° W: paleocoordinates 39.2° N, 115.5° W)
• coordinate based on political unit
• small collection-level geographic resolution
When: Coal Valley Formation, Miocene (23.0 - 5.3 Ma)
Environment/lithology: terrestrial
Reposited in the UCMP
Primary reference: D. I. Axelrod. 1956. Mio-Pliocene floras from west-central Nevada. University of California Publications in Geological Sciences 33:1-321 [J. Alroy/J. Alroy/J. Alroy]more details
PaleoDB collection 18860: authorized by John Alroy, entered by John Alroy on 12.04.1997
Creative Commons license: CC BY (attribution)
Taxonomic list
• middle (about 425') of Unit "1"
biotite from tuff near UCMP V-4707 and "200' above base of unit 1" dated at 10.8 (= 11.09) Ma by Evernden et al. 1964 (KA 551); this is the Coal Valley ash of Perkins et al. 1998, dated at 11.51 +/- 0.10 Ma by interpolation between Ar/Ar dates of 10.94 +/- 0.03 Ma and 11.57 +/- 0.05 Ma for ashes above and below it; date seems most applicable to localities from this lower level, i.e., UCMP V-4808 and V-5113
biotite from tuff near UCMP V-4707 and "200' above base of unit 1" dated at 10.8 (= 11.09) Ma by Evernden et al. 1964 (KA 551); this is the Coal Valley ash of Perkins et al. 1998, dated at 11.51 +/- 0.10 Ma by interpolation between Ar/Ar dates of 10.94 +/- 0.03 Ma and 11.57 +/- 0.05 Ma for ashes above and below it; date seems most applicable to localities from this lower level, i.e., UCMP V-4808 and V-5113
Show authors, comments, and common names
| Mammalia | |
|
Hipparion tehonense Merriam 1916 hipparionine horse | |