Also known as upper Unit A

Where: Trego County, Kansas (39.1° N, 99.8° W: paleocoordinates 40.3° N, 97.2° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Ogallala Formation, Clarendonian (12.5 - 9.4 Ma)

• "fossils randomly distributed" throughout a unit about 13 feet thick; underlies UM-K6-59 (see)

• group of beds-level stratigraphic resolution

Environment/lithology: "floodplain"; pebbly, argillaceous, sandy siltstone

Size classes: macrofossils, mesofossils

Collection methods: bulk, surface (float), sieve,

• Nettion specimen was collected by Claude W. Hibbard and Jerry Paulson, August 2, 1959

Primary reference: R. L. Wilson. 1968. Systematics and faunal analysis of a Lower Pliocene vertebrate assemblage from Trego County, Kansas. Contributions from the Museum of Paleontology, University of Michigan 22(7):75-126 [J. Alroy/J. Alroy/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 18449: authorized by John Alroy, entered by John Alroy on 26.03.1995, edited by Meg Hall

Creative Commons license: CC BY (attribution)