are the same as those in the gneisses, that is, quartz, microcline, microperthite, oligoclase, hornblende...addition to magnetite, are hornblende, pyroxene, quartz, plagioclase, and apatite. Calcite and pyrite,...gray, or bluish marble containing here and there a quartz, grain, a particle of pyrite, small flakes of graphite...white, gray, or bluish marble, containing a few quartz grains, pyrite crystals, graphite flakes, and crystals...partly sericitized plagioclase, cracked and strained quartz, irregular grains of magnetite, and small round |