Plagioclase is the dominant phenocryst. It is generally subhedral to euhedral, with tabular habit and prismatic elongation. It exhibits a poikilitic texture, with numerous inclusions of opaques and some glass inclusions. Other phenocrysts present are dominantly subhedral and smaller (generally less than 0.5 mm) than the plagioclase crystals, although a few phenocrysts of pyroxene and hornblende measure up to 3 mm. They commonly show a poikilitic texture, often with inclusions of opaques.
(Mercado and Rose, 1992)