Cedar Springs Draw (Miocene of the United States)

Also known as USGS D856

Where: Moffat County, Colorado (40.6° N, 108.1° W: paleocoordinates 41.2° N, 105.2° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Browns Park Formation, Miocene (23.0 - 5.3 Ma)

Environment/lithology: terrestrial

Reposited in the USGS

Primary reference: J. G. Honey and G. A. Izett. 1988. Paleontology, taphonomy, and stratigraphy of the Browns Park Formation (Oligocene and Miocene) near Maybell, Moffat County, Colorado. United States Geological Survey Professional Paper 1358:1-52 [J. Alroy/J. Alroy/J. Ju]more details

PaleoDB collection 18846: authorized by John Alroy, entered by John Alroy on 27.09.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

• discussed by Izett 1975 as "west of Maybell"
dates of 23.3 +/- 3.7 Ma FTz and "about 25" Ma KA biotite are from close to the base of the Fm.
ash about 1 mi NW of D856 and 15 m topographically below it dated at 11.3 +/- 0.8 Ma by FTz; stratigraphic relationship unclear but presumably close
additional records: USGS D854 "Meryceros sp." USGS D855 Procamelus or Aepycamelus
Mammalia
 Perissodactyla - Equidae
Megahippus sp. McGrew 1938 anchitheriine horse
 Carnivora - Canidae
Microtomarctus cf. conferta Matthew 1918 bone-crushing dog
 Ungulata - Camelidae
Camelidae indet. Gray 1821 camel
two forms
cf. Protolabis sp. Cope 1876 camel
Michenia sp. Frick and Taylor 1971 camel
 Ungulata - Antilocapridae
Merycodus warreni Leidy 1858 pronghorn
Merycodontinae indet. Matthew 1904 pronghorn