JDNM 267 Hawk Rim Main locality (Miocene of the United States)

Where: Crook County, Oregon (44.0° N, 120.1° W: paleocoordinates 43.8° N, 114.1° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: late Hemingfordian mammal zone, Mascall Formation, Hemingfordian (20.4 - 16.0 Ma)

Environment/lithology: terrestrial; lithified, muddy, silty sandstone

• Mascall Formation sediments are composed of primarily fluvial and lacustrine deposits, generally of a uniform tan to light yellow color. In the Crooked River Basin, the Mascall has significantly more fluvial sequences than even the lowermost portion of the type area (Bestland, 1998), with thick cross-bedded sandstones and pebble conglomerates common

Size class: macrofossils

Preservation: permineralized

Collection methods: surface (float), surface (in situ),

Primary reference: W. N. F. McLaughlin, S. S. B. Hopkins, and M. D. Schmitz. 2016. A new late Hemingfordian vertebrate fauna from Hawk Rim, Oregon, with implications for biostratigraphy and geochronology. Journal of Vertebrate Paleontology e1201095 :1-21 [N. Famoso/N. Famoso/N. Famoso]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 212622: authorized by Nicholas Famoso, entered by Nicholas Famoso on 17.08.2020

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Mammalia
 Rodentia - Sciuridae
Protospermophilus sp.
Protospermophilus sp. Gazin 1930 squirrel
 Rodentia - Castoridae
Monosaulax sp., Anchitheriomys sp.
Monosaulax sp. Stirton 1935 beaver
Anchitheriomys sp. Roger 1885 beaver
 Carnivora - Mustelidae
Watay tabutsigwii n. gen. n. sp.
Watay tabutsigwii n. gen. n. sp. McLaughlin et al. 2016 weasel
 Carnivora - Amphicyonidae
Amphicyon cf. frendens
Amphicyon cf. frendens Matthew 1924 bear-dog
 Perissodactyla - Rhinocerotidae
Rhinocerotidae indet.
Rhinocerotidae indet. Gray 1821 rhinoceros
 Perissodactyla - Chalicotheriidae
cf. Moropus sp.
cf. Moropus sp. Marsh 1877 chalicothere
 Perissodactyla - Equidae
Desmatippus sp., Archaeohippus sp., Merychippus sp.
Desmatippus sp. Scott 1893 anchitheriine horse
Archaeohippus sp. Gidley 1906 anchitheriine horse
Merychippus sp. Leidy 1856 horse
 Artiodactyla - Camelidae
Camelidae indet.
Camelidae indet. Gray 1821 camel
 Artiodactyla - Palaeomerycidae
Dromomeryx sp., Rakomeryx sinclairi
Dromomeryx sp. Douglass 1909 ruminant
Rakomeryx sinclairi Matthew 1918 ruminant