Also known as Lance Formation, Wyoming
Where: Niobrara County, Wyoming (43.1° N, 104.6° W: paleocoordinates 49.6° N, 79.5° W)
• coordinate stated in text
When: Lance Formation, Late/Upper Maastrichtian (70.6 - 66.0 Ma)
Environment/lithology: terrestrial; lithified, gray, 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
Polypodiopsida | |
Woodwardia ? crenata Knowlton 1900 | |
Palaeoaster | |
Angiospermae | |
Fraxinus leii ash | |
Viburnum montanum Knowlton 1900 honeysuckle | |
Cercidiphyllum arcticum katsura | |
Laurophyllum coloradensis laurel
Laurophyllum salicifolium laurel | |
Dicotyledoneae | |
Trapa ? microphylla Lesquereux 1875 water caltrop | |
Angiospermae | |
Ficus ? trinervis Knowlton 1900 fig | |
Salix lancensis willow | |
Dryophyllum subfalcatum Lesquereux 1875 | |
Quercus ? viburnifolia Lesquereux 1878 oak | |
Aristolochites brittoni magnoliids | |
Carpites | |
Carpites sp. Schimper 1874 | |
Dombeyopsis | |
Dombeyopsis obtusa Lesquereux 1872 | |
Phyllites | |
Phyllites sp. Brongniart 1822 |