Hiatt
Basic information
Sample name: Hiatt

Sample aka: L5418; 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, -104.7° W
Latlng basis: stated in text

Formation: Fort Union

Time interval: Early Palaeocene

Zone: Puercan

Max Ma: 66.0

Min Ma: 65.7

Age basis: paleomag

Geography comments: "in sec. 1., T. 15 N., R. 55 E., in Makoshika State Park"
from the lower Ludlow Member of the Fort Union Formation and "about 10 m above the K/T boundary"
"near the end of the time represented by Chron 29r" based on local paleomagnetic data and "middle Puercan (Pu2?)" (maximum age based on the ICS 2023 date for the K-Pg boundary minimum age based on Ogg 2020)

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Environment
Lithology: sandstone

Taphonomic context: fluvial deposit

Habitat comments: "in the basal part of a thick sequence of channel sandstones"

Methods
Life forms: ungulates, other small mammals

Sampling methods: screenwash

Sample size: 20 specimens

Years: 1985, 1986, 1990 - 1992

Museum: Museum of the Rockies

Net or trap nights: 0

kg screened: 1500

Basal area status: not applicable

Sampling comments: "discovered in 1965. Over the years, Dr. Hiatt and research groups from SUNY Stony Brook have collected a number of teeth from the surface"
David W. Krause "led field crews... in 1985 and 1986; he and Joseph Hartman jointly led field parties... in 1990, 1991, and 1992"
"In 1991, approximately 1500 kg of matrix was removed... for screen washing, but with disappointing results"

Metadata
Sample no: 4553

Contributor no: John Alroy

Enterer: John Alroy

Created: 2024-12-04 08:53:50

Modified: 2024-12-04 08:53:50

Abundance distribution
Each square represents a species. Square sizes are proportional to counts. Values are logged.
Statistics
8 species
4 singletons
total count 20
geometric series index: 23.1
Fisher's α: 4.942
geometric series k: 0.7573
Hurlbert's PIE: 0.7842
Shannon's H: 1.8033
Good's u: 0.8051
Register
†Neoplagiaulax cf. kremnus 4
Neoplagiaulax sp. 1
Neoplagiaulacidae indet.3
Stygimys sp. 1
Baioconodon nordicum = †Baioconodon cf. nordicus 1
Carcinodon sp. 1
?
†Oxyacodon ferronensis 2
†Tinuviel eurydice 7