Bartlett High
Basic information
Sample name: Bartlett High
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: 5
Unit order: below to above
Max Ma: 33.214
Min Ma: 30.977
Age basis: paleomag
Geography comments: coordinate based on the map in Fig. 1
from three localities entirely confined to the area's section 4 (see Fig. 1)
from a stratigraphic interval within chron C12r (age assignment based on the boundaries of C12r according to Ogg 2020)
the text misidentifies the normal zone in Fig. 3 as chron C11n instead of C13n
"about 20 to 25 ft (6.2-7.7 m) thick, beginning 135 ft (41.2 m) above the PWL"
from three localities entirely confined to the area's section 4 (see Fig. 1)
from a stratigraphic interval within chron C12r (age assignment based on the boundaries of C12r according to Ogg 2020)
the text misidentifies the normal zone in Fig. 3 as chron C11n instead of C13n
"about 20 to 25 ft (6.2-7.7 m) thick, beginning 135 ft (41.2 m) above the PWL"
Environment
Lithology: siltstone
Habitat comments: "A massive light brown siltstone"
Methods
Life forms: carnivores,rodents,ungulates,other small mammals
Sample size: 42 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: 4594
Contributor: John Alroy
Enterer: John Alroy
Created: 2024-12-09 12:06:26
Modified: 2024-12-09 12:06:26
Abundance distribution
12 species
5 singletons
total count 42
geometric series index: 30.2
Fisher's α: 5.612
geometric series k: 0.7772
Hurlbert's PIE: 0.7944
Shannon's H: 1.9920
Good's u: 0.8843
Each square represents a species. Square sizes are proportional to counts.
• Find matching samples
Register