Muddy Tork
Basic information
Sample name: Muddy Tork

Sample aka: L6205; Makoshika State Park

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: 47.09° N, -104.72° W
Latlng basis: stated in text

Formation: Hell Creek

Time interval: Maastrichtian

Zone: Lancian

Max Ma: 68.178

Min Ma: 66.38

Age basis: paleomag

Geography comments: "in sec. 2, T. 15 N., R. 55 E., on land owned by Dawson County Community College, just outside Makoshika State Park"
"about 11 m below the K/T boundary" and in Chron 30n based on local paleomagnetic data (age assignment based on Ogg 2020)

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Environment
Lithology: sandstone

Taphonomic context: fluvial deposit

Habitat comments: "in the basal part of a sandstone forming a feature known as the Witches Hat"

Methods
Life forms: other small mammals

Excluded forms: snails

Sampling methods: screenwash

Sample size: 28 specimens

Years: 1992

Museum: Museum of the Rockies

Net or trap nights: 0

kg screened: 1000

Basal area status: not applicable

Sampling comments: "discovered by Dr. Robert Hiatt... rediscovered in 1992, at which time mammalian fossils were found. A few snail steinkerns have also been recovered"
"approximately 1000 kg of matrix was removed for screen washing"

Metadata
Sample no: 4550

Contributor no: John Alroy

Enterer: John Alroy

Modifier no: John Alroy

Created: 2024-12-04 08:36:49

Modified: 2024-12-04 08:43:39

Abundance distribution
Each square represents a species. Square sizes are proportional to counts. Values are logged.
Statistics
10 species
6 singletons
total count 28
geometric series index: 38.5
Fisher's α: 5.565
geometric series k: 0.7402
Hurlbert's PIE: 0.672
Shannon's H: 1.6647
Good's u: 0.7909
Register
†Mesodma cf. thompsoni 3
Mesodma sp. 1
†Meniscoessus robustus 15
†Turgidodon rhaister 1
Pediomys krejcii = †Leptalestes cf. krejcii 1
Pediomyidae indet.1
"Pediomys elegans or P. cooki" (now in separate genera)
Pediomys hatcheri = †Protolambda hatcheri 1
Pediomys florencae = †Protolambda florencae 2
†Didelphodon vorax 2
Didelphodon sp. 1
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