QUARTZITE TONGUE AT REPUBLIC, MICH. 



683 



Fig. 1. — The Vicinity of the Republic Mine. A, A = Area underlaid by the Upper 

 Marquette quartzite. B, B = Jasper Wedge. C, C = Ouartzite Tongue. D, D = 

 Diamond-drill holes. E, E = Open pits. F, F = Area occupied by the Lower 

 Marquette Jasper. T = Thompson pit. Contours (from Brooks) at ten-foot 

 intervals. The heavy black line is the outcrop of the base of the Upper Mar- 

 quette Series. When dotted it is covered, or not precisely determinable. 



