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Hornfels
What is Hornfels?
Hornfels is a fine-grained nonfoliated metamorphic rock with no specific composition. It is produced by contact metamorphism. Hornfels is a rock that was "baked" while near a heat source such as a magma chamber, sill or dike.
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| Hornfels: The specimen shown is about two inches (five centimeters) across. |
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