Sand Draw
Basic information
Sample name: Sand Draw
Reference: P. O. McGrew. 1944. An early Pleistocene (Blancan) fauna from Nebraska. Field Museum of Natural History Geological Series 9(2):33-66 [ER 4184]
Geography
Country: United States
State: Nebraska
County: Brown
Coordinate: 42.63° N, -99.84° W
Coordinate basis: stated in text
Scale: outcrop
Formation: Fullerton
Time interval: Late Pliocene
Zone: Blancan
Ma: 3.1
Age basis: AEO
Geography comments: "along the steep bank of a dry creek known locally as Sand Draw, sec. 25, T. 31 N., R. 22 W., six miles north of Ainsworth"
the exposures extend "approximately 800 yards along the draw"
the fossils are "probably" from the Fullerton Formation
said to be early Pleistocene, correlated with Broadwater, and Blancan, but late Blancan and therefore late Pliocene in modern terminology
the exposures extend "approximately 800 yards along the draw"
the fossils are "probably" from the Fullerton Formation
said to be early Pleistocene, correlated with Broadwater, and Blancan, but late Blancan and therefore late Pliocene in modern terminology
Environment
Lithology: siliciclastic (mixed)
Taphonomic context: fluvial deposit
Habitat comments: "few mammals" are from a "Sandy marl" but "bulk of mammals" are from an immediately underlying "Sand and clay, stream-bedded"
Methods
Life forms: carnivores,rodents,ungulates,turtles,fishes
Sample size: 48 specimens
Museum: Field Museum of Natural History
Sampling comments: collected "on several occasions" by Bryan Patterson and James H. Quinn, and McGrew paid "a brief visit to the locality in 1940"
Metadata
Sample number: 4648
Contributor: John Alroy
Enterer: John Alroy
Created: 2025-01-09 05:41:34
Modified: 2025-01-09 05:41:34
Abundance distribution
15 species
8 singletons
total count 48
geometric series index: 45.8
Fisher's α: 7.490
geometric series k: 0.8326
Hurlbert's PIE: 0.8395
Shannon's H: 2.2009
Good's u: 0.8360
Each square represents a species. Square sizes are proportional to counts.
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Register
| Ameiuridae indet. | 4 | |
| Emydidae indet. | 1 | |
| "Pseudemys sp." also compared to Trachemys, regarded as a synonym | ||
| Testudinidae indet. | 2 | |
| "Testudo spp." | ||
| †Geomys quinni | 11 | |
| type | ||
| †Procastoroides sweeti | 6 | |
| †Canis lepophagus | 2 | |
| Skinner and Hibbard (1972): "Canis cf. latrans" | ||
| Trigonictis kansasensis = †Trigonictis macrodon | 1 | |
| Taxidea cf. taxus | 1 | 7.0 kg carnivore |
| Machairodontinae indet. | 1 | |
| Skinner and Hibbard (1972): "Smilodon sp." | ||
| †Stegomastodon primitivus | 1 | |
| Hippotigris simplicidens = †Equus simplicidens | 13 | |
| Platygonus sp. | 1 | |
| Camelops sp. | 1 | |
| †Gigantocamelus spatulus | 1 | |
| Skinner and Hibbard (1972): "Gigantocamelus sp." | ||
| †Capromeryx tauntonensis | 2 | |
| Morgan and Morgan (1995): "Capromeryx sp." | ||