Where: Morton County, North Dakota (47.0° N, 102.1° W: paleocoordinates 51.3° N, 82.0° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Bear Den Member (Golden Valley Formation), Clarkforkian (56.8 - 55.8 Ma)

• Above Harnisch lignite

• bed-level stratigraphic resolution

Environment/lithology: "channel"; siltstone

Size class: macrofossils

Preservation: mold/impression, adpression

Reposited in the USNM

Collection methods: quarrying,

Primary reference: L. J. Hickey. 1977. Stratigraphy and paleobotany of the Golden Valley Formation (Early Tertiary) of western North Dakota. The Geological Society of America Memoir 150:1-183 [H. Sims/S. Ostrowski/J. Cassara] more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 10803: authorized by Hallie Sims, entered by Summer Ostrowski on 25.06.2001