igneous rock

Thesaurus

Noun

1.

igneous rock - rock formed by the solidification of molten magma rock, stone - material consisting of the aggregate of minerals like those making up the Earth's crust; "that mountain is solid rock"; "stone is abundant in New England and there are many quarries" andesite - a dark grey volcanic rock aplite - light-colored and fine-grained granitic rock consisting chiefly of quartz and feldspars groundmass - (geology) the matrix of fine-grained crystalline material in which larger crystals are embedded adesite - dark greyish extrusive rock batholite, batholith, pluton, plutonic rock - large mass of intrusive igneous rock believed to have solidified deep within the earth diorite - a granular crystalline intrusive rock gabbro - one of a family of granular intrusive rocks pegmatite - a form of igneous rock consisting of extremely coarse granite resulting from the crystallization of magma rich in rare elements peridotite - a dark coarse-grained igneous rock consisting principally of olivine rhyolite - very acid volcanic rock volcanic rock - extrusive igneous rock solidified near or on the surface of the Earth porphyritic rock, porphyry - any igneous rock with crystals embedded in a finer groundmass of minerals sodalite - a vitreous mineral consisting of sodium aluminum silicate and sodium chloride in crystalline form; occurs in igneous rocks