a fine-grained metamorphic rock usually formed at shallow depths
Origin of hornfelsGer, horn rock ; from horn, horn + fels, rock: see fell
A fine-grained metamorphic rock composed of quartz, feldspar, mica, and other minerals, formed by the metamorphism of sedimentary rocks from heat associated with magma.
Origin of hornfelsGerman : Horn, horn; see hornblende + Fels, rock, cliff (from Middle High German vels, from Old High German felis).
(countable and uncountable, plural hornfelses)
German, meaning "horn stone", after its frequent association with glacial "horn peaks" in the Alps.