Antelope Creek (SDSM V582)
Basic information
Sample name: Antelope Creek (SDSM V582)
Sample aka: Slim Buttes
Reference: P. R. Bjork. 1967. Latest Eocene vertebrates from northwestern South Dakota. Journal of Paleontology 41(1):227-236 [ER 4141]
Geography
Country: United States
State: South Dakota
County: Harding
Coordinate: 45.34° N, -103.14° W
Coordinate basis: based on political unit
Formation: Slim Buttes
Time interval: Late Eocene
Zone: Duchesnean
Ma: 39.1
Age basis: AEO
Geography comments: "from within a mile of the type section" of the Slim Buttes Formation "on Antelope Creek" within T. 16 N., R. 8 E. (coordinate based on the midpoint of this township and range, which is in an area of badlands)
thought to be Duchesnean
thought to be Duchesnean
Environment
Lithology: siliciclastic (mixed)
Taphonomic context: fluvial deposit
Habitat comments: "The Slim Buttes Formation is a thin sequence of variegated sands, silts, and clays"
the presence of a gar and Allognathosuchus "suggests that a permanently flowing river was present" and Amynodontopsis "is indicative of a stream environment"
the presence of a gar and Allognathosuchus "suggests that a permanently flowing river was present" and Amynodontopsis "is indicative of a stream environment"
Methods
Life forms: ungulates,turtles,other reptiles,fishes
Sample size: 26 specimens
Museum: South Dakota School of Mines
Sampling comments: no details of collection methoeds are given
Metadata
Sample number: 4598
Contributor: John Alroy
Enterer: John Alroy
Modifier no: John Alroy
Created: 2024-12-11 10:03:45
Modified: 2024-12-11 10:18:33
Abundance distribution
10 species
4 singletons
total count 26
geometric series index: 25.0
Fisher's α: 5.949
geometric series k: 0.8195
Hurlbert's PIE: 0.8431
Shannon's H: 2.0710
Good's u: 0.8521
Each square represents a species. Square sizes are proportional to counts.
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Register
| Lepisosteus sp. | 1 | |
| Graptemys sp. | 2 | |
| ? | ||
| Trionychidae indet. | 1 | |
| Allognathosuchus cf. riggsi = †Alligator cf. prenasalis | 1 | |
| Epihippus intermedius = †Duchesnehippus intermedius | 3 | |
| Teleodus thyboi = †Duchesneodus uintensis | 6 | |
| type | ||
| †Colodon ? cingulatus | 2 | |
| †Amynodontopsis bodei | 6 | |
| Agriochoeridae indet. | 1 | |
| Leptotragulinae indet. | 3 | |