Chamita Formation (Middle Brown Unit) (Neogene of the United States)

Where: Rio Arriba County, New Mexico (36.5° N, 107.0° W: paleocoordinates 36.9° N, 105.3° W)

• coordinate based on political unit

When: Chamita Formation, Hemphillian (10.3 - 4.9 Ma)

• member-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Primary reference: B. J. MacFadden. 1977. Magnetic polarity stratigraphy of the Chamita Formation stratotype (Mio-Pliocene) of North-central New Mexico. American Journal of Science 200 [J. Alroy/J. Alroy/J. Ju]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 19290: authorized by John Alroy, entered by John Alroy on 19.05.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

• paleomag chron 3An.1n according to MacFadden, but C4n.2n according to Lindsay et al. 1984
Mammalia
 Lagomorpha - Leporidae
Hypolagus sp. Dice 1917 rabbit
 Xenarthra - Megalonychidae
? Pliometanastes galushai n. sp. Hirschfeld and Webb 1968 edentate
see Hirschfeld and Webb 1968