Greenwood Canyon Quarry (Miocene to of the United States)

Also known as Dalton Quarry

Where: Morrill County, Nebraska (41.7° N, 103.1° W: paleocoordinates 42.1° N, 101.1° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Ash Hollow Formation, Clarendonian to Clarendonian (12.5 - 9.4 Ma)

Environment/lithology: terrestrial

Primary reference: J. A. Breyer. 1985. National Geographic Society Research Reports 18 [J. Alroy/J. Alroy]more details

PaleoDB collection 18181: authorized by John Alroy, entered by John Alroy on 05.08.1992

Creative Commons license: CC BY (attribution)

Taxonomic list

• underlies an ash dated at 9.3 +/- 0.8 Ma (FT on glass): Marshall et al. 1979
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Mammalia
 Carnivora - Felidae
Machairodus sp., Nimravides thinobates
Machairodus sp. Kaup 1833 cat
Nimravides thinobates Macdonald 1948 cat
 Artiodactyla - Tayassuidae
Prosthennops serus
Prosthennops serus Cope 1877 peccary
 Artiodactyla - Camelidae
Alforjas sp., Megatylopus sp.
Alforjas sp. Harrison 1979 camel
Megatylopus sp. Matthew and Cook 1909 camel
 Perissodactyla - Rhinocerotidae
Teleoceras sp.
Teleoceras sp. Hatcher 1894 rhinoceros
 Perissodactyla - Equidae
Neohipparion cf. leptode
Neohipparion cf. leptode Merriam 1915 hipparionine horse