go to ORKG: http://orkg.org/orkg/predicate/P41216
Volcanic glass (nm)
Volcanic glass, any glassy rock formed from lava or magma that has a chemical composition close to that of granite (quartz plus alkali feldspar).
Volcanic glass, any glassy rock formed from lava or magma that has a chemical composition close to that of granite (quartz plus alkali feldspar).