ammonites
UNSM Sx-24 (Lower Orella) (Oligocene of the United States)

Where: Sioux County, Nebraska (42.4° N, 103.8° W: paleocoordinates 43.6° N, 95.7° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: lower Orella Member (Brule Formation), Orellan (33.9 - 33.3 Ma)

Environment/lithology: terrestrial

Reposited in the UNSM

Primary reference: C. B. Schultz and C. H. Falkenbach. 1968. Bulletin of the American Museum of Natural History 139 [J. Alroy/J. Alroy] more details

PaleoDB collection 17267: authorized by John Alroy, entered by John Alroy on 05.08.1996

Creative Commons license: CC BY-NC-ND (attribution-noncommercial-no derivatives)