Mineralogical Composition: Felsic and Intermediate; Muscovite, Quartz, Potassium Feldspar, Plagioclase Feldspar, Pyroxene, Amphibole, Biotite Texture (extrusive/intrusive): Extrusive; Vesicular Other distinctive properties: White, yellowish, gray to gray-brown; No crystal structure; Formed as pyroclastic material is ejected into the air as a froth; lava solidifies quickly trapping the bubbles
