metamorphic rock

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metamorphic rock

Sedimentary or igneous rock altered by great heat or pressure, e.g. limestone changed to marble.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.metamorphic rock - rock altered by pressure and heatmetamorphic rock - rock altered by pressure and heat  
amphibolite - a metamorphic rock composed chiefly of amphibole and plagioclase
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"
marlite, marlstone - metamorphic rock with approximately the same composition as marl
hornfels, hornstone - a fine-grained metamorphic rock formed by the action of heat on clay rocks
gneiss - a laminated metamorphic rock similar to granite
schist - any metamorphic rock that can be split into thin layers