35 about 1 km. The prehnite encloses small clusters of epidote crystals. Other minerals found at the mine include native copper, chlorite, calcite, K feldspar and quartz. Prehnite occurs in veins and amygdules in basaltic rocks exposed along the Montreal River Gorge in sec. 20 and 21 T.47N. R.1E. near Saxon Falls.
Associated minerals are native copper, quartz and calcite.