hornfels facies


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Related to hornfels facies: Metabasites, Sanidinite Facies

hornfels facies

[′hȯr‚felz ¦fā·shēz]
(petrology)
Rock formed at depths in the earth's crust not exceeding 6.2 miles (10 kilometers) at temperatures of 250-800°C; includes albite-epidote hornfels facies, pyroxene-hornfels facies, and hornblende-hornfels facies.