Where: Mercer County, North Dakota (47.3° N, 102.1° W: paleocoordinates 51.6° N, 81.9° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Bear Den Member (Golden Valley Formation), Clarkforkian (56.2 - 54.9 Ma)

• bed-level stratigraphic resolution

Environment/lithology: "channel"; siltstone

Size class: macrofossils

Preservation: 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: paleoecologic analysis

PaleoDB collection 10810: authorized by Hallie Sims, entered by Summer Ostrowski on 25.06.2001

Creative Commons license: CC BY (attribution)