Peterson's Quarry A ( of the United States)

Where: Sioux County, Nebraska (42.4° N, 103.8° W: paleocoordinates 43.3° N, 98.8° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Harrison Formation (Arikaree Group), Harrisonian (24.8 - 18.5 Ma)

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Primary reference: O. A. Peterson. 1907. The Miocene Beds of Western Nebraska and Eastern Wyoming and Their Vertebrate Faunae. Annals of Carnegie Museum 4(3):21-72 [J. Alroy/J. Alroy/J. Marcot]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 17818: authorized by John Alroy, entered by John Alroy on 15.05.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

• 100 yards N of the main Agate Spring Quarries
Harrison Fm. sensu stricto: Hunt 1985a
Show authors, comments, and common names
Mammalia
 Perissodactyla - Equidae
Equidae indet.2
Equidae indet.2 Gray 1821 horse
 Perissodactyla - Chalicotheriidae
Chalicotheriidae indet.2
Chalicotheriidae indet.2 Gill 1872 chalicothere
 Perissodactyla - Rhinocerotidae
Diceratherium niobrarense n. sp., Menoceras arikarense1
Diceratherium niobrarense n. sp. Peterson 1906 rhinoceros
provenance confirmed by Peterson 1920; D. "petersoni" type is also from Quarry A, see Peterson 1920
Menoceras arikarense1 Barbour 1906 rhinoceros
1Alroy 2002; 2Hunt 1972