Sec. 5 and 6 T.33N. R.18W, near Dresser. Working quarry - private property. Keweenawan lava flows, metamorphosed to the greenschist facies, cross-cut by quartz veins.
Basalt coarsens to a gabbro pegmatite towards the middle of the thickest flows.
Augite - primary igneous material, in phenocrysts. Often altered to metamorphic minerals. Bornite - sparse, in veins and amygdules. Calcite - flat rhombohedral white to pale yellow crystals and cleavable masses in veins. Chalcocite - sparse massive in quartz veins.