School Well
Basic information
Sample name: School Well
Sample aka: L6427a; L6427b
Reference: J. P. Hunter, J. H. Hartman, and D. W. Krause. 1997. Mammals and mollusks across the Cretaceous-Tertiary boundary from Makoshika State Park and vicinity (Williston Basin), Montana. Contributions to Geology, University of Wyoming 32(1):61-114 [ER 4119]
Geography
Country: United States
State: Montana
County: Dawson
Coordinate: 47.23° N, -104.74° W
Coordinate basis: stated in text
Formation: Fort Union
Time interval: Early Palaeocene
Zone: Torrejonian
Age basis: paleomag
Geography comments: "on private land to the northwest of Glendive in sec. 17., T. 17 N., R. 55 E."
"from the upper parts of the Ludlow Member... approximated at about 60 m above the Hell Creek-Fort Union formational contact"
"Torrejonian"
"from the upper parts of the Ludlow Member... approximated at about 60 m above the Hell Creek-Fort Union formational contact"
"Torrejonian"
Environment
Lithology: sandstone
Taphonomic context: fluvial deposit
Habitat comments: "in the lowermost part of a thick channel sandstone"
Methods
Life forms: primates,ungulates,other small mammals
Sample size: 7 specimens
Years: 1993
Museum: Museum of the Rockies
Sampling comments: "discovered in 1993" by a "SUNY crew" led by Hunter
"mollusk-bearing laterally" (assumed to mean snails, not clams)
"mollusk-bearing laterally" (assumed to mean snails, not clams)
Metadata
Sample number: 4556
Contributor: John Alroy
Enterer: John Alroy
Created: 2024-12-04 09:51:24
Modified: 2024-12-04 09:51:24
Abundance distribution
4 species
1 singleton
total count 7
geometric series index: 10.7
Fisher's α: 3.878
geometric series k: 0.7937
Hurlbert's PIE: 0.6905
Shannon's H: 1.3518
Good's u: 0.9286
Each square represents a species. Square sizes are proportional to counts.
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Register
| †Ptilodus montanus | 2 | |
| Litaletes cf. mantiensis = †Promioclaenus cf. lemuroides | 2 | |
| Periptychus sp. | 1 | |
| †Paromomys maturus | 2 |