Turkey Creek (Eocene of the United States)

Also known as UNM locs. 202 and 203

Where: Sierra County, New Mexico (33.4° N, 107.7° W: paleocoordinates 35.1° N, 99.9° W)

• coordinate stated in text

• small collection-level geographic resolution

When: upper Member (Rubio Peak Formation), Chadronian (37.2 - 33.9 Ma)

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; volcaniclastic, gray, blue siltstone

• "gray-blue andesitic siltstone"

Size class: macrofossils

Primary reference: S. G. Lucas. 1986. The first Oligocene mammal from New Mexico. Journal of Paleontology 60(6):1274-1276 [J. Alroy/J. Alroy/J. Alroy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 17032: authorized by John Alroy, entered by John Alroy on 18.02.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

• this fm. has been dated at 36.7 +/- 1.4 Ma (K-Ar) in the same Co. and mountain range, but relationship of dated unit to fossil localities is unclear; Lucas and Williamson 1993c discuss a date of 35.28 Ma Ar-Ar (no error given) for the overlying Kneeling Nun Tuff, said to be "well- established" and therefore useable as a tie point
Show authors, comments, and common names
Mammalia
 Artiodactyla - Praetragulidae
Parvitragulus sp.1
Parvitragulus sp.1 Emry 1978 ruminant
 Artiodactyla - Oromerycidae
Montanatylopus matthewi
Montanatylopus matthewi Prothero 1986 even-toed ungulate
 Perissodactyla - Brontotheriidae
Brontotheriidae indet.1
Brontotheriidae indet.1 Marsh 1873 brontothere
 Rodentia - Cylindrodontidae
Jaywilsonomys ojinagaensis2
Jaywilsonomys ojinagaensis2 Ferrusquia and Wood 1969 rodent
1Alroy 2002; 2Lucas 1986