UMMP SC-67
Basic information
Sample name: UMMP SC-67
Reference: P. D. Gingerich. 1989. New earliest Wasatchian mammalian fauna from the Eocene of northwestern Wyoming: composition and diversity in a rarely sampled high-floodplain assemblage. University of Michigan Papers on Paleontology 28:1-97 [ER 4106]
Geography
Country: United States
State: Wyoming
County: Park
Coordinate: 44.77° N, -108.88° W
Latlng basis: stated in text
Scale: outcrop
Formation: Willwood
Time interval: Early Eocene
Zone: Wasatchian
Ma: 56.0
Age basis: other
Geography comments: "at the south end of Polecat Bench (Fig. 4), in the southwestern part of the NW1/4, NE1/4, Section 10, Township 55 North, Range 100 West"
at the 1520 m level in the Clarks Fork Basin section
just barely above the Palaeocene-Eocene boundary (age assignment based on the ICS 2003 scale)
at the 1520 m level in the Clarks Fork Basin section
just barely above the Palaeocene-Eocene boundary (age assignment based on the ICS 2003 scale)
Environment
Lithology: mudstone
Taphonomic context: overbank deposit, paleosol
Habitat comments: "The unit appears to represent unusually slow sediment accumulation and a long period of subaerial exposure" and is interpreted as a distal floodplain paleosol
the sediments are "sharply weathering red and purple mudstones and white sandstones... The fossiliferous interval is in a complex of red and gray mudstones about 15-20 m thick"
the sediments are "sharply weathering red and purple mudstones and white sandstones... The fossiliferous interval is in a complex of red and gray mudstones about 15-20 m thick"
Methods
Life forms: carnivores, primates, rodents, ungulates, other large mammals, other small mammals, birds, lizards, turtles, other reptiles, fishes, snails
Sample size: 310 specimens
Years: 1976, 1984, 1986
Museum: UMMP
Net or trap nights: 0
kg screened: 907
Basal area status: not applicable
Sampling comments: see p. 4 for history of collecting: there were "eleven summers" of collecting but only three are specified
"Most fossils were found on the surface... Screen washing of approximately one ton of a white sandstone... yielded a few teeth"
5 specimens of Celtis phenucodorum are also tabulated
"Most fossils were found on the surface... Screen washing of approximately one ton of a white sandstone... yielded a few teeth"
5 specimens of Celtis phenucodorum are also tabulated
Metadata
Sample no: 4534
Contributor no: John Alroy
Enterer: John Alroy
Modifier no: John Alroy
Created: 2024-12-02 04:33:29
Modified: 2024-12-06 22:58:54
Abundance distribution
Each square represents a species. Square sizes are proportional to counts. Values are logged.
Statistics
47 species
19 singletons
total count 310
geometric series index: 98.6
Fisher's α: 15.409
geometric series k: 0.9159
Hurlbert's PIE: 0.9279
Shannon's H: 3.1191
Good's u: 0.9388
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