Wheatland County (unnamed locality), Montana, United States; Judith River Formation, Campanian, late Cretaceous [details]
"From the Eagle coal mine, Bear Creek, Carbon county, Montana. [...] 'Bear Creek' horizon", USA; Paleocene [details]
Eagle coal mine, Bear Creek, Carbon county, Montana, United States; Clarkforkian (zone Cf1), Thanetian, late Paleocene [details]
"From SE. 1/4 of SE. 1/4, Sec. 10, T. 5 N. , R. 13 E., Sweetgrass county, Montana. About 4000 feet above base of ... [details]