Restored stratigraphic cross sections and coal correlations in the Tongue River member of the Fort Union Formation, Powder River area, Montana

Exposures of the lower two thirds of the Tongue River Member of the Paleocene Fort Union Formation were measured along the Powder River valley in southeastern Montana in the Moorhead and Birney-Broadus coalfields.  This report documents the stratigraphic variations, lateral continuity of partly eroded coal beds along the line of section, and shows ten sections for the Tongue River Member in this study area.  This report is a companion to the report by Flores and Canavello (1979).  The study area represents a linear distance of 35 miles along the Powder River valley and extends from the Wyoming-Montana State line to a point 7 miles southeast of Broadus. Mont. (see index map).  Within this area are relatively continuous outcrops of the middle and lower parts of the Tongue River Member.