Also known as Lance Formation, Wyoming
Where: Niobrara County, Wyoming (43.2° N, 104.6° W: paleocoordinates 49.6° N, 79.4° W)
• coordinate stated in text
• outcrop-level geographic resolution
When: Lance Formation, Late/Upper Maastrichtian (70.6 - 66.0 Ma)
• member-level stratigraphic resolution
Environment/lithology: terrestrial; lithified, concretionary, gray siltstone and lithified, gray, sandy shale
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 34970: authorized by Bruce Tiffney, entered by Julia Fosdick on 21.10.2003
Creative Commons license: CC BY (attribution)
Taxonomic list
Asplenites | |
Phyllites | |
Phyllites sp. Brongniart 1822 | |
Filicites | |
Polypodiopsida | |
Equisetum sp. Linnaeus 1753 horsetail | |
? Woodwardia crenata Knowlton 1900 | |
Angiospermae | |
Pistia corrugata Lesquereux 1874 water cabbage | |
Typha sp. Linnaeus 1753 bulrush | |
Laurophyllum coloradensis laurel | |
Cercidiphyllum ellipticum katsura | |
Fraxinus leii ash | |
Vitis stantoni grapevine | |
Dryophyllum subfalcatum Lesquereux 1875 | |
Dicotyledoneae | |
? Trapa microphylla Lesquereux 1875 water caltrop |