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Metamorphic Rock Types

Pictures of Metamorphic Rocks

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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

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Images 1-12 of 18
Usually a schistAmphiboliteMetaclaystoneArgilliteNot always a blue schistBlueschistGround below the groundCataclasite
From very deep subductionEclogiteMakes up the lower crustGneissA facies more than a rock typeGreenschistAltered basaltGreenstone
The main contact-metamorphic rockHornfelsMetamorphosed carbonatesMarbleHalf-melted gneissMigmatiteGround to a powderMylonite
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