ammonites
Harris Ranch Unit E Silt ( of the United States)

Also known as Blue Ash Channel

Where: Fall River County, South Dakota (43.2° N, 103.2° W: paleocoordinates 44.1° N, 97.3° W)

• coordinate based on political unit

When: Arikareean (30.8 - 20.4 Ma)

• member-level stratigraphic resolution

Environment/lithology: terrestrial

Primary reference: W. F. Simpson. 1985. Dakoterra 2(2) [J. Alroy/J. Alroy] more details

PaleoDB collection 17520: authorized by John Alroy, entered by John Alroy on 18.02.1993

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