Definitions for "Felsic"
description forĀ  a light-colored igneous rock that is poor in iron and magnesium and contains abundant feldspars and quartz
A lava type comprised primarily of feldspar (fel) and silica (s) usually found at continental boundry subduction zones. These are generally thick, pasty lavas with high silicon dioxide levels.
opposite of mafic; "rich in feldspar"; a term applied to magmas or igneous rocks that are silica-rich as rhyolites or granites.