PLATE 16 Polymictic breccia composed mostly of rhyolite angular clasts cemented by cryptocrystalline quartz.
Polymictic breccia composed mostly of rhyolite angular clasts cemented by cryptocrystalline quartz. Cut by later fine veinlets of clear quartz. Hydrothermal breccia from Sherwood, Agate Creek, Forsayth (Sample #231516; +100 g/t Au, 42 g/t Ag).