Also known as Lance Formation, Wyoming
Where: Niobrara County, Wyoming (43.1° N, 104.5° W: paleocoordinates 47.8° N, 69.7° W)
• coordinate stated in text
• outcrop-level geographic resolution
When: Cretaceous Formation, Late/Upper Cretaceous (100.5 - 66.0 Ma)
• formation-level stratigraphic resolution
Environment/lithology: terrestrial
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 34974: authorized by Bruce Tiffney, entered by Julia Fosdick on 21.10.2003
Creative Commons license: CC BY (attribution)
Taxonomic list
Polypodiopsida | |
Equisetum sp. Linnaeus 1753 horsetail | |
Angiospermae | |
"Carpites verrucosus" = Porosia verrucosa
"Carpites verrucosus" = Porosia verrucosa Lesquereux 1878 | |
Typha sp. Linnaeus 1753 bulrush | |
Laurophyllum salicifolium laurel
Laurophyllum wardiana laurel | |
Cercidiphyllum ellipticum katsura | |
? Rhamnus minutus buckthorn | |
? Quercus viburnifolia Lesquereux 1878 oak | |
Dryophyllum subfalcatum Lesquereux 1875 | |
Salix lancensis willow | |
Pistacia eriensis cashew | |
"Viburnum marginatum" = Cissus marginata
"Viburnum marginatum" = Cissus marginata Lesquereux 1872 | |
? Ficus trinervis Knowlton 1900 fig | |
Sequoia dakotensis coast redwood | |
Dombeyopsis | |
Dombeyopsis obtusa Lesquereux 1872
Dombeyopsis trivialis Lesquereux 1872 | |
Equisetopsida | |