(Solved): 17) The metamorphic grade of pressure-altered rocks includes O) schist, a rock with strong foliatio ...

17) The metamorphic grade of pressure-altered rocks includes O) schist, a rock with strong foliation subjected to moderate heat. P) sandstone, a rock with no foliation made entirely of quartz. Q) basalt, a mafic rock dominated by amphibole and pyroxene. R) gneiss, a rock with distinct light and dark banding.