THE QUARTZ MOUNTAIN SHOWING CONSISTS OF THREE AREAS OF ALTERATION AND MINERALIZATION IN SEDIMENTARY ROCKS OF THE CRESTON FORMATION (PROTEROZOIC AGE) SANDWICHED BETWEEN TWO DIORITE STOCKS AND CUT BY THE ST. MARY FAULT ZONE. THE MAIN SHOWING HAS BEEN WORKED BY A SMALL OPEN PIT. A WIDE QUARTZ VEIN CONTAINS ABUNDANT PYRITE, CHALCOPYRITE, LIMONITE, HEMA- TITE, AND LESSER AMOUNTS OF GALENA, MALACHITE, BORNITE, AND FREE GOLD. THE QUARTZ VEIN APPEARS TO OCCUPY A WEST-PLUNGING ISOCLINAL FOLD STRUCTURE. ON THE QUARTZ HILL MINERAL CLAIM WHERE THE DIORITE IS COARSE GRAINED IT GIVES A STRONG MAGNETIC RESPONSE.