Where: Slope County, North Dakota (46.3° N, 103.9° W: paleocoordinates 52.2° N, 79.0° W)

• coordinate stated in text

• small collection-level geographic resolution

When: FUI zone, Ludlow Member (Fort Union Formation), Puercan (66.0 - 63.3 Ma)

• 6.5m to Hell Creek-Fort Union datum, 3.905m to K-T boundary based on calculations in Johnson (2002)

• bed-level stratigraphic resolution

Environment/lithology: mire or swamp; poorly lithified, carbonaceous shale

Size class: macrofossils

Preservation: adpression

Collection methods: quarrying, mechanical,

• Specimens located at Yale Peabody Museum

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 25451: authorized by Kirk Johnson, entered by Michele Reynolds on 12.09.2002

Creative Commons license: CC BY (attribution)