Thistle Creek: Middle Pleistocene, Canada
collected 1999, 2001
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Mammalia
- Proboscidea
- Elephantidae
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Mammuthus sp.
Brookes 1828
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1 specimen | |||||||||
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Mammalia
- Perissodactyla
- Equidae
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Equus sp.
Linnaeus 1758
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7 specimens | |||||||||
| large | ||||||||||
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Equus cf. lambei
Hay 1917
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1 specimen | |||||||||
| synonym of Equus niobrarensis alaskae | ||||||||||
| (1 measurement) | ||||||||||
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Mammalia
- Carnivora
- Mustelidae
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Mustela sp.
Linnaeus 1758
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2 specimens | |||||||||
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Mammalia
- Soricidae
|
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Sorex cf. cinereus
Kerr 1792
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1 specimen | |||||||||
| (2 measurements) | ||||||||||
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Mammalia
- Rodentia
- Cricetidae
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Guildayomys matthewsi n. sp.
Storer 2004
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5 specimens | |||||||||
| (4 measurements) | ||||||||||
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Microtus sp.
Schrank 1798
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137 specimens | |||||||||
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Microtus morlani n. sp.
Storer 2004
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47 specimens | |||||||||
| (2 measurements) | ||||||||||
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Dicrostonyx sp.
Gloger 1841
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10 specimens | |||||||||
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Lemmus sp.
Link 1795
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28 specimens | |||||||||
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Mammalia
- Rodentia
- Sciuridae
|
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Eutamias cf. minimus
(Bachman 1839)
|
1 specimen | |||||||||
| (1 measurement) | ||||||||||
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Spermophilus cf. parryii
(Richardson 1825)
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2 specimens | |||||||||
| recombined as Urocitellus parryii | ||||||||||
| originally entered as "Spermophilus cf. parryi" | ||||||||||
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Mammalia
- Lagomorpha
- Ochotonidae
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Ochotona sp.
Link 1795
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5 specimens | |||||||||
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Ochotona whartoni
Guthrie and Matthews 1971
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3 specimens | |||||||||
| (3 measurements) | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Canada | State/province: | Yukon |
| Coordinates: | 63.1° North, 139.3° West (view map) | ||
| Paleocoordinates: | 63.1° North, 139.3° West | ||
| Basis of coordinate: | stated in text | ||
| Geographic resolution: | small collection |
Time
| Period: | Quaternary | Epoch: | Pleistocene |
| Stage: | Chibanian | 10 m.y. bin: | Cenozoic 6 |
| Key time interval: | Middle Pleistocene | ||
| Age range of interval: | 0.77400 - 0.12900 m.y. ago |
Stratigraphy
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: said to be late Irvingtonian, Middle Pleistocene, below the 190 ka Sheep Creek tephra, and in a normally reversed section and therefore younger than 780 ka "A 15 m thick section" with fossils "from the lowest of four strata at Eddas Bench, Organic 1" which is "approximately 3.5 m thick before melting of included ice" | |||||
Lithology and environment
| Primary lithology: | paleosol/pedogenic siltstone |
| Lithology description: "fine-grained deposits... permafrost" | |
| Environment: | terrestrial indet. |
| Geology comments: lower part was deposited in "a tundra environment" and upper part "represents a forested environment dominated by spruce" | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils,mesofossils |
Collection methods and comments
| Collection methods: | bulk,surface (in situ),sieve,field collection |
| Rock censused: | 6000 kg |
| Reason for describing collection: | taxonomic analysis | Collection dates: | 1999, 2001 |
| Collection method comments: small mammals were collected by screenwashing, and large mammals by collecting "in place... using standard prospecting techniques"
collections are in the Heritage Resources Unit of the Yukon Government in Whitehorse | |
| Taxonomic list comments:additional, undescribed fossils include "coprolites, mollusks, and plant and insect remains" and the bed is "rich in wood and [contains] abundant mollusk shells" | |
Metadata
| Also known as: | Eddas Bench | ||
| Database number: | 74336 | ||
| Authorizer: | J. Alroy | Enterer: | J. Alroy | Research group: | vertebrate |
| Created: | 2007-08-02 17:43:17 | Last modified: | 2007-08-02 20:43:17 |
| Access level: | the public | Released: | 2007-08-02 17:43:16 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 24963. | J. E. Storer. 2004. A Middle Pleistocene (late Irvingtonian) mammalian fauna from Thistle Creek, Klondike Goldfields region of Yukon Territory, Canada. Paludicola 4(4):137-150 [J. Alroy/J. Alroy] |