Thistle Creek (Pleistocene of Canada)

Also known as Eddas Bench

Where: Yukon, Canada (63.1° N, 139.3° W: paleocoordinates 63.1° N, 139.3° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Middle Pleistocene (0.8 - 0.1 Ma)

• 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"

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; paleosol/pedogenic siltstone

• lower part was deposited in "a tundra environment" and upper part "represents a forested environment dominated by spruce"
• "fine-grained deposits... permafrost"

Size classes: macrofossils, mesofossils

Collected in 1999, 2001

Collection methods: bulk, surface (in situ), sieve,

• 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

Primary reference: 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]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 74336: authorized by John Alroy, entered by John Alroy on 02.08.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

• additional, undescribed fossils include "coprolites, mollusks, and plant and insect remains" and the bed is "rich in wood and [contains] abundant mollusk shells"
Mammalia
 Rodentia - Cricetidae
Dicrostonyx sp. Gloger 1841 lemming
Lemmus sp. Link 1795 vole
Microtus sp. Schrank 1798 vole
Microtus morlani n. sp. Storer 2004 vole
Guildayomys matthewsi n. sp. Storer 2004 mouse
 Rodentia - Sciuridae
Spermophilus cf. parryii Richardson 1825 arctic ground squirrel
originally entered as "Spermophilus cf. parryi"
Eutamias cf. minimus Bachman 1839 least chipmunk
 Lagomorpha - Ochotonidae
Ochotona sp. Link 1795 pika
Ochotona whartoni Guthrie and Matthews 1971 pika
 Perissodactyla - Equidae
Equus sp., "Equus cf. lambei" = Equus alaskae
Equus sp. Linnaeus 1758 horse
large
"Equus cf. lambei" = Equus alaskae Winans 1989 horse
 Tribosphenida - Soricidae
Sorex cf. cinereus Kerr 1792 cinereus shrew
 Carnivora - Mustelidae
Mustela sp. Linnaeus 1758 weasel
 Proboscidea - Elephantidae
Mammuthus sp. Brookes 1828 mammoth