acid plagioclase
5.a metamorphic rock composed chiefly of amphibole and plagioclase.
6.A chiefly amphibole rock with minor plagioclase and little quartz.
7.A gray, fine-grained volcanic rock, chiefly plagioclase and feldspar.
8.DISTRIBUTION AND COMPOSITIONAL CHARACTERISTIC OF VOLCANIC PLAGIOCLASE IN THE OKINAWA TROUGH
9.A usually coarse-grained igneous rock composed chiefly of calcic plagioclase and pyroxene.
10.Based on the crystal growth elementary principle,a plagioclase crystalline velocity equation is suggested.
