Ptygmatic folds can occur restricted to compositional zones of the migmatite, for instance in fine-grained shale protoliths versus in coarse granoblastic sandy protolith.
12.
Although made of metamorphic rock, the mountain is actually composed of migmatite, metamorphosed at higher temperatures than gneiss but not sufficiently melted to become granite.
13.
The ridge is divided between two different rock formations, one made up of granitoid gneiss, the other of mixed gneiss and different kinds of migmatite.
14.
The largest fault is the Vermilion fault This provides evidence that the Quetico and Wawa subprovinces were joined by the collision of two continental plates, Structures in the migmatite include folds and foliations; the foliations cut across both limbs of earlier-phase folds.
15.
Gold-bearing ( + /-Ag, W, Sb, As, Cu, Mo, Pb, Te, Zn, Hg ) veins occur in the tonalite, in small amounts in the schist, and in the Jurassic ? migmatite, but not in the western quartz monzonite or in the Tertiary sediments.
