79RB8 (long. 155o09'23"W,lat. 62o04'33"N, NE 1/4 of NW 1/4 of NE 1/4 of NW 1/4 of sec.21, tp. 23 N, rge. 32 W of      McGrath A-5 quadrangle. a 3 m bed 101 m below the top of the limestone (79RB8).