Also known as KJ87112
Where: Slope County, North Dakota (49.3° N, 104.0° W: paleocoordinates 55.4° N, 75.8° W)
• coordinate stated in text
• small collection-level geographic resolution
When: HCIa zone, Hell Creek Formation, Lancian (70.6 - 66.0 Ma)
• -75m to Hell Creek-Fort Union contact datum, -75m 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
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 48253: authorized by Kirk Johnson, entered by Kirk Johnson on 15.03.2005
Creative Commons license: CC BY (attribution)
Taxonomic list
Polypodiopsida | |
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Hepaticae | |
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Angiospermae | |
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"Dicotyledonae "HC56"" = Dicotyledoneae, "Dicotyledonae "HC158"" = Dicotyledoneae, "Dicotyledonae "HC159"" = Dicotyledoneae
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Leepierceia preartocarpoides | |
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