Sand Wash (Locality 3)
Basic information
Sample name: Sand Wash (Locality 3)
Reference: R. M. West and M. R. Dawson. 1975. Eocene fossil Mammalia from the Sand Wash Basin, northwestern Moffat County, Colorado. Annals of Carnegie Museum 45(11):231-253 [ER 4153]
Geography
Country: United States
State: Colorado
County: Moffat
Coordinate: 40.67° N, -108.42° W
Coordinate basis: estimated from map
Formation: Washakie
Time interval: Middle Eocene
Zone: Uintan
Geography comments: shown in Fig. 2 to be in the northwest quarter of secn. 9, T 8 N, R 98 W
from somewhere above the Robin's Egg Blue Tuff according to Stucky et al. (1996)
thought to be "on the Bridgerian-Uintan boundary" by West and Dawson and earliest Uintan or Shoshonian by Stucky et al. (1996)
Sutcky et al. (1996) are unable to correlate the zones represented by magnetic polarity data for the Sand Wash Basin with certainty, but in any event, their sections do not include Locality 3
from somewhere above the Robin's Egg Blue Tuff according to Stucky et al. (1996)
thought to be "on the Bridgerian-Uintan boundary" by West and Dawson and earliest Uintan or Shoshonian by Stucky et al. (1996)
Sutcky et al. (1996) are unable to correlate the zones represented by magnetic polarity data for the Sand Wash Basin with certainty, but in any event, their sections do not include Locality 3
Environment
Lithology: not described
Habitat comments: in the southeastern part of the basin yielding the fauna, "the sediment seems considerably finer, shows relatively less channelling, and floodplain and lacustrine sediments are predominant"
"deposited in a margial lacustrine-fluvial setting" according to Stucky et al. (1996)
"deposited in a margial lacustrine-fluvial setting" according to Stucky et al. (1996)
Methods
Life forms: carnivores,primates,rodents,ungulates
Sample size: 100 specimens
Years: 1961, 1963, 1964, 1972
Museum: Carnegie Museum, University of Colorado Museum
Sampling comments: Dawson opened the locality in 1961; it was revisited by the CM and AMNH in 1963; by the CM in 1964; and by West, Dawson, and M. C. McKenna in 1972
AMNH specimens are not described if there are any, and UCM specimens from this locality are also described
turtles and "small organisms, fish, amphibians and reptiles" are found in the southeastern part of the basin
AMNH specimens are not described if there are any, and UCM specimens from this locality are also described
turtles and "small organisms, fish, amphibians and reptiles" are found in the southeastern part of the basin
Metadata
Sample number: 4612
Contributor: John Alroy
Enterer: John Alroy
Created: 2024-12-14 16:45:21
Modified: 2024-12-14 16:45:21
Abundance distribution
9 species
2 singletons
total count 100
geometric series index: 17.1
Fisher's α: 2.397
geometric series k: 0.5859
Hurlbert's PIE: 0.4564
Shannon's H: 1.0648
Good's u: 0.9808
Each square represents a species. Square sizes are proportional to counts.
• Find matching samples
Register
| †Viverravus minutus | 1 | |
| †Notharctus robustior | 2 | |
| Leptotomus bridgerensis = †Leptotomus parvus | 12 | |
| Ischyromyidae indet. | 2 | |
| †Hyopsodus markmani | 72 | |
| Stucky et al. (1996): "Hyopsodus despiciens" | ||
| †Orohippus sylvaticus | 6 | |
| Hyracodontidate indet. | 2 | |
| Stucky et al. (1996): either Hyrachyus eximius or Forstercooperia grandis; "Hyrachyus modestus" | ||
| †Triplopus implicatus | 1 | |
| Stucky et al. (1996): "Hyrachyus sp." small species | ||
| Hylomeryx sp. | 2 | |
| Stucky et al. (1996): "Homacodon cf. vagans" | ||