Rabbit Graveyard (Lumpy Level)
Basic information
Sample name: Rabbit Graveyard (Lumpy Level)
Reference: E. P. Gustafson. 1986. Preliminary biostratigraphy of the White River Group (Oligocene, Chadron and Brule formations) in the vicinity of Chadron, Nebraska. Transactions of the Nebraska Academy of Sciences 14:7-19 [ER 4137]
Geography
Country: United States
State: Nebraska
County: Dawes
Coordinate: 42.87° N, -103.01° W
Coordinate basis: estimated from map
Scale: outcrop
Formation: Chadron
Time interval: Early Oligocene
Zone: Brule
Section: Chadron
Unit number: 4
Unit order: below to above
Max Ma: 33.726
Min Ma: 33.214
Age basis: paleomag
Geography comments: coordinate based on the map in Fig. 1
from two localities entirely confined to the area's section 4 (see Fig. 1)
from a stratigraphic interval in the Orella Member high in chron C13n (age assignment based on the boundaries of C13n according to Ogg 2020)
the text misidentifies the normal zone in Fig. 3 as chron C11n instead of C13n
from two localities entirely confined to the area's section 4 (see Fig. 1)
from a stratigraphic interval in the Orella Member high in chron C13n (age assignment based on the boundaries of C13n according to Ogg 2020)
the text misidentifies the normal zone in Fig. 3 as chron C11n instead of C13n
Environment
Lithology: siltstone
Habitat comments: "a fossiliferous dark brown clay-siltstone" that "produces mainly microfauna"
Methods
Life forms: carnivores,rodents,ungulates,other small mammals
Sample size: 24 specimens
Museum: Chadron State College
Sampling comments: "This paper is the result of three years of field work" (years not stated)
previous collections not enumerated here were made by the University of Nebraska State Museum and the AMNH
previous collections not enumerated here were made by the University of Nebraska State Museum and the AMNH
Metadata
Sample number: 4593
Contributor: John Alroy
Enterer: John Alroy
Created: 2024-12-09 12:02:18
Modified: 2024-12-09 12:02:18
Abundance distribution
11 species
7 singletons
total count 24
geometric series index: 47.1
Fisher's α: 7.859
geometric series k: 0.7943
Hurlbert's PIE: 0.7754
Shannon's H: 1.9658
Good's u: 0.7154
Each square represents a species. Square sizes are proportional to counts.
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