Evanston Formation

Geology

Members: unnamed (10), Hams Fork Conglomerate (1)

Lithologies: "siliciclastic" (3), mudstone (1), "shale" (1), coal (5)

Paleoenvironments: terrestrial indet. (3), fluvial indet. (8)

Age range: base of the Late/Upper Maastrichtian to the top of the Tiffanian or 70.60000 to 56.80000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Late/Upper Maastrichtian70.6 - 66.0USA (Wyoming) (165876)
Paleocene66.0 - 56.0USA (Wyoming) (40139 40088 40089 40132 40140 43307 43309 57985)
Tiffanian61.7 - 56.8USA (Wyoming) (14965 14999)