Coal Valley (UCMP V-3939): Miocene, Nevada
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Mammalia
- Camelidae
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Camelidae indet.
Gray 1821
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Mammalia
- Perissodactyla
- Equidae
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Equini indet.
Quinn 1955
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| "Pliohippus": Tedford et al. 1987 - quotes are theirs | ||||||||||
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Hippotherium sp.
Kaup 1832
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| "Hipparion or Neohipparion"; "fossette borders are extremely complicated"; Tedford et al. 1987 list Cormohipparion | ||||||||||
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Nannippus tehonensis
(Merriam 1916)
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= Hipparion tehonense
Merriam 1916
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Evernden et al. 1964 | |||||||||
| recombined as Hipparion gratum tehonense | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Nevada | County: | Mineral |
| Coordinates: | 38.5° North, 118.3° West (view map) | ||||
| Paleocoordinates: | 39.2° North, 115.5° West | ||||
| Basis of coordinate: | based on political unit | ||||
| Geographic resolution: | small collection |
Time
| Period: | Neogene | Epoch: | Miocene |
| 10 m.y. bin: | Cenozoic 5-6 | ||
| *Period: | Tertiary | ||
| Key time interval: | Miocene | ||
| Age range of interval: | 23.03000 - 5.33300 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Formation: | Coal Valley | Member: | basal |
| Local section: | CoalV | Local bed: | 3 |
| Local order: | bottom to top |
Lithology and environment
| Environment: | terrestrial indet. |
Taphonomy
| Modes of preservation: | body |
Collection methods and comments
| Museum repositories: | UCMP |
| Taxonomic list comments:Axelrod's Aldrich Station Fm. "Unit A6" is reassigned to the basal Coal Valley Fm. by Gilbert and Reynolds 1973 based on geochemical ash bed correlations of Perkins et al. 1998, the entire Coal Valley Fm. is superposed above the Esmeralda Fm. sites and I have merged the sections accordingly unit dated by Evernden et al. 1964: KA 414 11.2 (= 11.50) Ma: near top of A6, 2000' W of Aldrich Station "at" V-4706 KA 482 10.5 and 11.2 (= 10.78 and 11.50) Ma: top of A6 "near" V-4707 KA 500 10.6 (= 10.88) Ma: top of A6, "east of" V-3939 "closely associated with mammals"; average of this and KA 482 is 11.05 Ma KA 552 11.0 (= 11.29) Ma: A6 below 482 and 500 first three samples are all probably the Ammonia Tanks ash of Perkins et al. 1998, dated at 11.57 +/- 0.05 Ma; this date seems the best to use for UCMP V-3939 and V-4706 | |
Metadata
| Also known as: | Aldrich Station | ||
| Database number: | 18857 | ||
| Authorizer: | J. Alroy | Enterer: | J. Alroy | Research group: | vertebrate |
| Created: | 1994-04-30 00:00:00 | Last modified: | 2002-06-03 03:27:43 |
| Access level: | the public | Released: | 1994-04-30 00:00:00 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 969. | 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] |
Secondary references:
| 1473 | J. F. Evernden, D. E. Savage, G. H. Curtis and G. T. James. 1964. Potassium-argon dates and the Cenozoic mammalian chronology of North America. American Journal of Science 262:145-198 [J. Alroy/J. Alroy/J. Marcot] |