Scale 1:63,360 (W 107°45ʹ--W 107°30ʹ/N 46°45ʹ--N 46°30ʹ).
Relief shown by contours and spot heights. "Geology mapped by H.R. Smith ..." "Base map compiled from aerial photographs and General Land Office township plats." Includes col. quadrangle map, columnar section, index map, and selected list of wells drilled to April 15, 1961.
1 map : color ; on sheet 78 x 126 cm, folded in envelope 30 x 24 cm.