At Ring Mountain, andesite comprises 70% brown volcanic glass and vesicular textures as much as 15%. The plagioclastic matrix is trachytic. Augite, biotite, plagioclase and hornblende occur as microphenocrysts and comprise 1% to 7% of the andesite. Small qualities of quartz are common and occur as microxenocrysts. Microxenocrysts of orthoclase likely exist in andesite at Ring Mountain.