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: Basal Member (Marsland Formation), Harrisonian (24.8 - 18.5 Ma)

• basal "member" of Upper Harrison Beds

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Primary reference: R. M. Hunt, Jr. 1985. Faunal succession, lithofacies, and depositional environments in Arikaree rocks (lower Miocene) of the Hartville Table, Nebraska and Wyoming. Dakoterra 2(2):155-204 [J. Alroy/J. Alroy/J. Alroy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 17789: authorized by John Alroy, entered by John Alroy on 18.02.1993

Creative Commons license: CC BY (attribution)