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Meaning of hornfels

horn•fels

Pronunciation: (hôrn'felz), [key]
— n.
  1. a dark, fine-grained metamorphic rock, the result of recrystallization of siliceous or argillaceous sediments by contact metamorphism.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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