East of Whistler Squat Quarry
Basic information
Sample name: East of Whistler Squat Quarry
Sample aka: TMM 41466
Reference: C. J. Campisano, E. C. Kirk, K. E. B. Townsend, and A. L. Deino. 2014. Geochronological and taxonomic revisions of the middle Eocene Whistler Squat Quarry (Devil's Graveyard Formation, Texas) and implications for the early Uintan in Trans-Pecos Texas. PLoS ONE 9(e101516):1-21 [ER 4127]
Geography
Country: United States
State: Texas
County: Brewster
Coordinate: 29.58° N, -103.70° W
Coordinate basis: estimated from map
Scale: outcrop
Formation: Devil's Graveyard
Time interval: Middle Eocene
Zone: Uintan
Max Ma: 45.04
Min Ma: 44.88
Age basis: Ar-Ar
Geography comments: "at the western edge of Brewster County in the Agua Fria region between Big Bend National Park and Big Bend Ranch State Park" (coordinate estimated using Fig. 1)
this collection was recorded as "located about 300 yards east" of TMM 41372 (Whistler Squat Quarry) and "over a large area" according to the present authors
in the lower member of the Devil's Graveyard Formation sandwiched between the Quarry Tuff, dated here at 44.88 ± 0.04 Ma, and a biotite dated at 45.04 ± 0.10 Ma using single-crystal total-fusion 40Ar/39Ar dating
zone Ui1b (early Uintan)
this collection was recorded as "located about 300 yards east" of TMM 41372 (Whistler Squat Quarry) and "over a large area" according to the present authors
in the lower member of the Devil's Graveyard Formation sandwiched between the Quarry Tuff, dated here at 44.88 ± 0.04 Ma, and a biotite dated at 45.04 ± 0.10 Ma using single-crystal total-fusion 40Ar/39Ar dating
zone Ui1b (early Uintan)
Environment
Lithology: conglomerate
Taphonomic context: fluvial deposit
Habitat comments: "Wilson [7] described the main fossiliferous unit of the Whistler Squat Quarry as a weakly calcareously cemented bentonitic clay-pebble conglomerate with sanidine and biotite grains. This unit ranges up to 55 cm thick and is likely a fluvial channel remnant because it grades upward into cross-bedded sands and preserves variable degrees of water-worn bone"
Methods
Life forms: carnivores,primates,ungulates
Sampling methods: quarry
Sample size: 6 specimens
Years: 1970 - 1974
Museum: Texas Memorial Museum
Sampling comments: "collected by University of Texas field parties under the direction of J.A. Wilson from 1970-1974" and now at the University of Texas at Ausin
Metadata
Sample number: 4572
Contributor: John Alroy
Enterer: John Alroy
Created: 2024-12-07 06:03:05
Modified: 2024-12-07 06:03:05
Abundance distribution
5 species
4 singletons
total count 6
geometric series index: 50.0
Fisher's α: 14.116
geometric series k: 0.8409
Hurlbert's PIE: 0.7333
Shannon's H: 1.5607
Good's u: 0.3939
Each square represents a species. Square sizes are proportional to counts.
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