In the Little Rocky Mountains a sequence of shale, thin beds of limestone, and intraformational conglomerate overlying the Flathead sandstone of Middle Cambrian age and underlying the Bighorn dolomite of Late Ordovician age has been named the Emerson formation (Knechtel, in preparation). The type locality of the Emerson formation is at and near the mouth of Emerson Gulch, on Lodgepole Creek, in the SW. 14 of Sec. 20, T. 26 N., R. 25 E., Phillips County, Montana, about 412 miles south-southwest of Lodgepole Subagency of the Fort Belknap Indian Reservation.

The Emerson is extensively concealed by surficial...

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