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, -104.70° W
Coordinate basis: stated in text
Formation: Fort Union
Time interval: Early Palaeocene
Zone: Puercan
Max Ma: 66
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)
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)
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
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"
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 number: 4553
Contributor: John Alroy
Enterer: John Alroy
Created: 2024-12-04 08:53:50
Modified: 2024-12-04 08:53:50
Abundance distribution
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
Each square represents a species. Square sizes are proportional to counts.
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Register
| †Neoplagiaulax cf. kremnus | 4 | |
| Neoplagiaulax sp. | 1 | |
| Neoplagiaulacidae indet. | 3 | |
| Stygimys sp. | 1 | |
| Baioconodon cf. nordicum = †Baioconodon cf. nordicus | 1 | |
| Carcinodon sp. | 1 | |
| ? | ||
| †Oxyacodon ferronensis | 2 | |
| †Tinuviel eurydice | 7 | |