Lay Ranch Beds: Harrisonian, Wyoming
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia
- Perissodactyla
- Rhinocerotidae
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Menoceras sp.
Troxell 1921
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Diceratherium sp.
Marsh 1875
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Mammalia
- Perissodactyla
- Chalicotheriidae
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Moropus sp.
Marsh 1877
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Skolnick 1985 | |||||||||
"chalicothere" | ||||||||||
Mammalia
- Perissodactyla
- Equidae
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Equidae indet.
Gray 1821
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Mammalia
- Entelodontidae
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Dinohyus sp.
Peterson 1905
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Skolnick 1985 | |||||||||
"entelodont" | ||||||||||
Mammalia
- Merycoidodontidae
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Merychyus sp.
Leidy 1858
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Skolnick 1985 | |||||||||
"oreodont" | ||||||||||
Mammalia
- Camelidae
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Stenomylus gracilis
Peterson 1907
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Frick and Taylor 1968 | |||||||||
"Marsland" equivalent at "Spoon Buttes"; "Camelidae indet." | ||||||||||
Mammalia
- Carnivora
- Canidae
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Desmocyon thomsoni
(Matthew 1907)
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Wang et al. 1999 | |||||||||
"Upper Harrison beds... Spoon Buttes" and "southwest of Spoon Buttes"; "Canidae indet." | ||||||||||
Mammalia
- Carnivora
- Amphicyonidae
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Daphoenodon falkenbachi
Hunt 2002
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Hunt 2002 | |||||||||
"west of Spoon Butte" in rocks of "latest Arikareean" age (3 measurements) | ||||||||||
Adilophontes brachykolos
Hunt 2002
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Hunt 2002 | |||||||||
"southwest of Spoon Butte" in rocks of "latest Arikareean" age | ||||||||||
Amphicyonidae indet.
Haeckel 1886
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= Ysengrinia sp.
Ginsburg 1965
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Hunt 1998 | |||||||||
= Ysengrinia americana
Wortman 1901
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Hunt 2002 | |||||||||
both "West of Spoon Butte" and "East of Spoon Butte" | ||||||||||
Mammalia
- Carnivora
- Mustelidae
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Mustelidae indet.
Fischer 1817
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Mammalia
- Rodentia
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Rodentia indet.
Bowdich 1821
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see common names |
Geography
Country: | United States | State/province: | Wyoming | County: | Goshen |
Coordinates: | 42.0° North, 104.2° West (view map) | ||||
Paleocoordinates: | 42.9° North, 99.2° West | ||||
Basis of coordinate: | based on political unit |
Time
10 m.y. bin: | Cenozoic 4-5 | ||
*Period: | Tertiary | *Epoch: | Miocene | *Local age/stage: | Late/Upper Arikareean |
Key time interval: | Harrisonian | ||
Age range of interval: | 23.10000 - 18.50000 m.y. ago | ||
* legacy (obsolete) database fields |
Stratigraphy
Stratigraphic resolution: | member | ||||
Stratigraphy comments: said to be late Arikareean
rocks are roughly Upper Harrison equivalent and significantly older than those of the Spoon Butte Beds (see) |
Lithology and environment
Primary lithology: | not reported |
Environment: | terrestrial indet. |
Taphonomy
Modes of preservation: | body |
Size of fossils: | macrofossils |
Collection methods and comments
Reason for describing collection: | general faunal/floral analysis |
Taxonomic list comments:some material is probably from Sioux County, Nebraska
Hunt seems to think the locality is new, but F:AM records indicate the he is mistaken possibly relevant: Archaeohippus sp. Dingus 1990: F:AM specimen from ? Marsland Fm. "near Spoon Buttes"; this could be from the Spoon Butte Beds "Merychyus siouxensis" Loomis 1924: type, from "Lower harrison beds, ten miles west of Agate"; this is close to but perhaps 4 mi E of Spoon Buttes |
Metadata
Database number: | 17796 | ||
Authorizer: | J. Alroy | Enterer: | J. Alroy |
Modifier: | B. Allen | Research group: | vertebrate |
Created: | 1995-03-26 00:00:00 | Last modified: | 2023-07-29 05:44:07 |
Access level: | the public | Released: | 1995-03-26 00:00:00 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
6228. | R. M. Hunt, Jr. 1985. Geology and paleontology of the Patrick Buttes, Wyoming-Nebraska. National Geographic Society Research Reports 20:399-416 [J. Alroy/J. Alroy/J. Alroy] |
Secondary references:
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] | |
3178 | R. Skolnick. 1985. The geology and paleontology of the Lay Ranch beds. Proceedings of the Nebraska Academy of Sciences 95:54 [J. Alroy/J. Alroy/M. Uhen] | |
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] |