The Big Snowy Group is a stratigraphical unit of Chesterian age in the Williston Basin. It takes the name from Big Snowy Mountains in Montana, and was first described on the north slopes of the mountain by H.W. Smith in 1935.
The Big Snowy Group is a stratigraphical unit of Chesterian age in the Williston Basin. It takes the name from Big Snowy Mountains in Montana, and was first described on the north slopes of the mountain by H.W. Smith in 1935. (en)
The Big Snowy Group is a stratigraphical unit of Chesterian age in the Williston Basin. It takes the name from Big Snowy Mountains in Montana, and was first described on the north slopes of the mountain by H.W. Smith in 1935. (en)