USGS CMG InfoBank: Metamorphic Rocks

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Comment: 02:46 - 03:20 (00:34)
Source: Annenberg/CPB Resources - Earth Revealed - 18. Metamorphic Rocks
Keywords: "metamorphic rock", "fine-grained", granite, marble, "sedimentary rock", "igneous rock", metamorphism

Our transcription: Metamorphic rocks can appear in many forms: from platy, black, fine-grained stone to granite-like layered rock, to the marble used by sculptors.
One explanation why a wide variety of metamorphic rocks exists is simply that there are many different sedimentary and igneous rocks, each responding to metamorphic conditions in its own unique way.

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