Eighteen Mile District: Harrisonian, Wyoming

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia - Camelidae
Frick and Taylor 1968
"middle" and "high"
Mammalia - Merycoidodontidae
Schultz and Falkenbach 1950
Harrison Fm., 2.5 mi SW of Van Tassel or 18 mi SE of Lusk, Niobrara Co. (7 measurements)
Schultz and Falkenbach 1947
lowest, middle, and upper part of section
Schultz and Falkenbach 1947
middle and high part of section
Mammalia - Moschidae
Frick 1937
"18 miles S.E. of Lusk"
Mammalia - Carnivora - Canidae
"Upper Harrison beds... 18 mi southeast of Lusk, middle brown sand"; "high brown sand"; and "high in section"
Upper Harrison Beds
"below high brown sand"
Mammalia - Carnivora - Amphicyonidae
Hunt 2002
"Upper Harrison beds" (5 measurements)
Hunt 1998
"Upper Harrison beds, 18-Mile District" (5 measurements)
Hunt 2002
from the "High Brown Sand"
see common names

Geography
Country:United States State/province:Wyoming County:Goshen
Coordinates: 42.0° North, 104.2° West (view map)
Paleocoordinates:46.7° North, 93.8° West (Wright 2013)
Basis of coordinate:based on political unit
Time
10 m.y. bin: Cenozoic 4-5
*Period:Tertiary *Epoch:Miocene
Key time interval: Harrisonian
Age range of interval: 23.1 - 18.5 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Lithology and environment
Primary lithology: not reported
Environment:terrestrial indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection excludes:some genera
Reason for describing collection:taxonomic analysis
Taxonomic list comments:not the same as Sand Gulch (see), but 2.5 mi SW of Van Tassel according to Schultz and Falkenbach 1950 and possibly confused with that locality by other authors
Metadata
Also known as:18 Miles District, 18 mi southeast of Lusk
Database number:17780
Authorizer:J. Alroy Enterer:J. Alroy
Modifier:J. Marcot Research group:vertebrate
Created:1995-03-26 00:00:00 Last modified:2025-02-22 15:12:02
Access level:the public Released:1995-03-26 00:00:00
Creative Commons license:CC0
Reference information

Primary reference:
3558. X. Wang, R. H. Tedford, and B. E. Taylor. 1999. Phylogenetic systematics of the Borophaginae (Carnivora: Canidae). Bulletin of the American Museum of Natural History 243:1-392 [J. Alroy/J. Alroy/J. Alroy]

Secondary references:

6294 J. Alroy. 2002. Synonymies and reidentifications of North American fossil mammals. [J. Alroy/J. Alroy/M. Kouvari]
6222 C. Frick. 1937. Horned ruminants of North America. Bulletin of the American Museum of Natural History 69:1-669 [J. Alroy/J. Alroy/M. Uhen]
1549 C. Frick and B. E. Taylor. 1968. A Generic Review of the Stenomyline Camels. American Museum Novitates 2353:1-51 [J. Alroy/J. Alroy/B. Beatty]
1977 R. M. Hunt, Jr. 1998. Amphicyonidae. 196-227 [J. Alroy/J. Alroy/J. Alroy]
7676 R. M. Hunt, Jr. 2002. New amphicyonid carnivorans (Mammalia, Daphoeninae) from the early Miocene of southeastern Wyoming. American Museum Novitates 3385:1-41 [J. Alroy/J. Alroy/J. Alroy]
3064 C. B. Schultz and C. H. Falkenbach. 1947. Merychyinae, a subfamily of oreodonts. Bulletin of the American Museum of Natural History 88(4):157-286 [J. Alroy/J. Alroy/J. Marcot]
3066 C. B. Schultz and C. H. Falkenbach. 1950. Phenacocoelinae, a new subfamily of oreodonts. Bulletin of the American Museum of Natural History 95(3) [J. Alroy/J. Alroy/J. Ju]