P3854 (Cretaceous of the United States)

Also known as Lance Formation, Wyoming

Where: Niobrara County, Wyoming (43.1° N, 104.6° W: paleocoordinates 47.8° N, 69.9° W)

• coordinate stated in text

When: Lance Formation, Late/Upper Cretaceous (100.5 - 66.0 Ma)

Environment/lithology: terrestrial; lithified, gray, calcareous siltstone

• "lens of dark-gray, hard, calcareous siltstone"

Size class: mesofossils

Preservation: mold/impression, original carbon

Collection methods: bulk,

Primary reference: E. Dorf. 1942. Upper Cretaceous floras of the Rocky Mountain region; Flora of the Lance Formation at its type locality, Niobrara County, Wyoming. Contributions to Palaeontology [B. Tiffney/J. Fosdick/J. Fosdick]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 34922: authorized by Bruce Tiffney, entered by Julia Fosdick on 19.10.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

 Polypodiales - Blechnaceae
 Urticales - Dilleniidae
 Scrophulariales - Asteridae
 Magnoliales - Lauraceae
 Saxifragales - Cercidiphyllaceae
 Dipsacales - Caprifoliaceae
 Malvales - Tiliaceae
 Proteales - Platanaceae
 Fagales - Fagaceae
 Violales - Salicaceae
Carpites sp. Schimper