Spring Creek 1 (Level 1) ( of the United States)

Also known as UWBM A5867-1

Where: Meagher County, Montana (46.5° N, 111.0° W: paleocoordinates 47.6° N, 105.1° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Deep River Formation, Arikareean (30.8 - 20.4 Ma)

• said to be early Arikareean

Environment/lithology: terrestrial

Primary reference: A. D. Barnosky. 1982. A New Species of Proscalops (Mammalia, Insectivora) from the Arikareean Deep River Formation, Meagher County, Montana. Journal of Paleontology 56(5) [J. Alroy/J. Alroy/J. Ju]more details

PaleoDB collection 17695: authorized by John Alroy, entered by John Alroy on 26.07.1994

Creative Commons license: CC BY (attribution)

Taxonomic list

• secs 14, 23 T10N R5E
underlies UWBM A5867-2
Mammalia
 Rodentia - Aplodontidae
Niglarodon loneyi n. sp.2 Rensberger 1981 mountain beaver
Niglarodon blacki n. sp.2 Rensberger 1981 mountain beaver
Niglarodon progressus2 Rensberger 1981 mountain beaver
 Rodentia - Geomyidae
Gregorymys sp. Wood 1936 pocket gopher
 Rodentia - Mylagaulidae
Trilaccogaulus montanensis1 Rensberger 1979 rodent
 Tribosphenida - Proscalopidae
Proscalops intermedius n. sp. Barnosky 1982 placental