Metamorphic rocks are those that form by the effects of heat, pressure and shear upon igneous and sedimentary rocks. Some form during mountain-building by forces of regional metamorphism, others from the heat of igneous intrusions in contact metamorphism. A third category forms by the mechanical forces of fault movements: cataclasis and mylonitization.
This is just a starting point to explore the variety in metamorphic rocks.
Learn more:
Introducing Igneous Rocks
Introducing Sedimentary Rocks
Introducing Metamorphic Rocks
More picture galleries: Fossils | Geologic Features and Processes | Glaciers and Ice | Landforms | Minerals | Rocks | Geology and Society
Amphibolite | Blueschist | Cataclasite | Eclogite |
Gneiss | Greenschist | Greenstone | Hornfels |
Marble | Migmatite | Mylonite | Phyllite |
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