Mark's Locality
Basic information
Sample name: Mark's Locality
Sample aka: WMU locality 110
Reference: R. L. Anemone and W. Dirks. 2009. An anachronistic Clarkforkian mammal fauna from the Paleocene Fort Union Formation (Great Divide Basin, Wyoming, USA). Geologica Acta 7(1-2):113-124 [ER 4114]
Geography
Country: United States
State: Wyoming
County: Sweetwater
Coordinate: 41.83° N, -108.67° W
Coordinate basis: stated in text
Formation: Fort Union
Time interval: Late Palaeocene
Zone: Clarkforkian
Geography comments: "in the NW section 3, Township 21 N, Range 99 W... just west of the Bitter Creek road approximately 30 km north of Bitter Creek Station"
in the "upper Fort Union formation... close to the mapped but locally unexposed contact between the Fort Union and the overlying Wasatch formation"
"The upper fossil-bearing unit is approximately 6 meters up-section from the lower unit"
a "transitional fauna between early and middle Clarkforkian stages" (i.e., between Cf1 and Cf2)
in the "upper Fort Union formation... close to the mapped but locally unexposed contact between the Fort Union and the overlying Wasatch formation"
"The upper fossil-bearing unit is approximately 6 meters up-section from the lower unit"
a "transitional fauna between early and middle Clarkforkian stages" (i.e., between Cf1 and Cf2)
Environment
Lithology: mudstone
Taphonomic context: overbank deposit
Habitat comments: "Mammals are concentrated at two levels in the grey-green silty mud-stones, representing overbank deposits"
"mostly isolated teeth, a number of disarticulated postcrania, and a few jaws"
"mostly isolated teeth, a number of disarticulated postcrania, and a few jaws"
Methods
Life forms: carnivores,primates,rodents,ungulates,other small mammals
Sampling methods: screenwash,surface
Sample size: 113 specimens
Years: 1994
Museum: Western Michigan University
Sampling comments: "first located and identified in 1994... The locality has been surface collected during five different field seasons and screen washed. Wet screen washing (with .3 cm screen) of the upper fossil-bearing unit in the field resulted in the retrieval of approximately 20 kg of fossil-bearing matrix" but the weight of the original sediment is not indicated
Metadata
Sample number: 4545
Contributor: John Alroy
Enterer: John Alroy
Created: 2024-12-03 08:42:23
Modified: 2024-12-03 08:42:23
Abundance distribution
17 species
5 singletons
total count 113
geometric series index: 33.7
Fisher's α: 5.554
geometric series k: 0.7993
Hurlbert's PIE: 0.8255
Shannon's H: 2.1378
Good's u: 0.9565
Each square represents a species. Square sizes are proportional to counts.
• Find matching samples
Register
| Parectypodus sp. | 1 | |
| Prochetodon sp. | 2 | |
| Peradectes sp. | 2 | |
| †Plesiadapis cookei | 20 | |
| †Plesiadapis dubius | 18 | |
| Plesiadapis sp. | 2 | |
| cf. | ||
| Phenacolemur cf. pagei = †Dillerlemur cf. pagei | 5 | |
| †Carpolestes nigridens | 7 | |
| Didymictis sp. | 1 | |
| Palaeosinopa sp. | 1 | |
| Thryptacodon sp. | 1 | |
| †Apheliscus nitidus | 36 | |
| †Ectocion osbornianus | 9 | |
| Phenacodus sp. | 1 | |
| Diacocherus sp. | 3 | |
| Plagioctenodon sp. | 2 | |
| plus 1 indeterminate Nyctitheriidae | ||
| Ischyromyidae indet. | 2 | |