Also known as The Wall, KJ9907

Where: Bowman County, North Dakota (46.0° N, 103.8° W: paleocoordinates 52.4° N, 77.2° W)

• coordinate stated in text

• small collection-level geographic resolution

When: HCIII zone, Hell Creek Formation, Lancian (70.6 - 65.5 Ma)

• -12.4m to Hell Creek-Fort Union contact datum, -12.4m to K-T boundary based on calculations in Johnson (2002)

• bed-level stratigraphic resolution

Environment/lithology: fine channel fill; poorly lithified sandstone

Size class: macrofossils

Preservation: adpression

Reposited in the DMNH

Collection methods: quarrying, mechanical,

• Specimens located at Denver Museum of Nature & Science

Primary reference: K. R. Johnson. 2002. Megaflora of the Hell Creek and lower Fort Union Formations in the western Dakotas: Vegetational response to climate change, the Cretaceous-Tertiary boundary event, and rapid marine transgression. The Hell Creek Formation and the Cretaceous-Tertiary boundary in the northern Great Plains: An integrated continental record of the end of the Cretaceous. 361:329-391 [S. Wing/S. Wing/K. Johnson] more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 48186: authorized by Kirk Johnson, entered by Kirk Johnson on 15.03.2005