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hornfels

   Also found in: Encyclopedia, Wikipedia, Hutchinson 0.01 sec.
horn·fels  (hôrnflz)
n. pl. hornfels
A fine-grained metamorphic rock composed of quartz, feldspar, mica, and other minerals, formed by the action of intrusive rock upon sedimentary rock, especially shale.
[German : Horn, horn; see hornblende + Fels, rock, cliff (from Middle High German vels, from Old High German felis).]
hornfels [ˈhɔːnfɛlz]
n
(Earth Sciences / Geological Science) a hard compact fine-grained metamorphic rock formed by the action of heat from a magmatic intrusion on neighbouring sedimentary rocks Also called hornstone
[German: literally, horn rock]
hornfels  (hôrnflz)
A fine-grained metamorphic rock having a uniform grain size and formed by contact metamorphism.
ThesaurusLegend:  Synonyms Related Words Antonyms
Noun1.hornfels - a fine-grained metamorphic rock formed by the action of heat on clay rocks
hornstone
metamorphic rock - rock altered by pressure and heat


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Trench 4 in the Copper King area discovered hornfels at the contact with a quartz
United States : Fire River Gold Signs Formal Option Agreement on NI ... by TendersInfo
Typically, hornfels is a dense compact rock produced from slate by the contact action of some
Effect of aggregate type, gradation, and compaction level on thermal ... by Mrawira, Donath M.; Luca, Joseph / Canadian Journal of Civil Engineering
in quartz veinlets in both the stock and the hornfels is the source for the nearby placers.
Piedmont Announces First Drill Program Completed At Dutch Flat, Nevada by Business Wire
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