hornfels

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horn·fels

 (hôrn′fĕlz′)
n. pl. hornfels
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.

[German : Horn, horn; see hornblende + Fels, rock, cliff (from Middle High German vels, from Old High German felis).]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

hornfels

(ˈhɔːnfɛlz)
n
(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]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

horn•fels

(ˈhɔrn fɛlz)

n.
a dark fine-grained metamorphic rock, the result of recrystallization of siliceous or argillaceous sediments by thermal metamorphism.
[1850–55; < German, =Horn horn + Fels rock, cliff]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

hornfels

A type of granular, fine-grained metamorphic rock.
Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.hornfels - a fine-grained metamorphic rock formed by the action of heat on clay rocks
metamorphic rock - rock altered by pressure and heat
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
Moreover, the emplacement of the Logrosan granite has produced a superimposed contact metamorphism characterized by an inner biotite-tourmaline hornfel zone, an intermediate zone of micaceous spotted slates, and a transition zone of recrystallized slates and some metaquartzite levels (Fig.
Recent modelling of this chargeability/resistivity target indicated a dip to the west and a plunge to the northeast toward an area of hornfels; a contact metamorphic effect that occurs in country rock surrounding an intrusive body.
Inventions and Innovations The Musical Stones of Skiddaw, 1840, Keswick Museum (Cumbria) This eight octave lithophone was built by Joseph Richardson - a member of the Keswick family - in 1840 from 'hornfels', a type of stone quarried from Skiddaw mountain.
This eight octave lithophone was built by Joseph Richardson -- a member of the Keswick family - in 1840 from 'hornfels', a type of stone quarried from Skiddaw mountain.
The oxidized sulfide mineralization is associated with quartz veining, vein stockwork, and quartz healed breccia hosted in hornfels altered clastic sediments.
At the contact zone between the granite and the limestone, massive skarns have been recognized (Figure 2(d)); stratabound skarn zones also occur in hornfels [8].
This valley is surrounded by several lithological units: (i) to the north, the Hercynian basement of Sierra Morena comprising a wide variety of Palaeozoic rocks such as granitic plutonic rocks and metamorphic rocks (slates, schists and hornfels), (ii) to the south, the Subbetic domain of the External Zone of the Betic Cordillera (Sierra Magina), which constitutes a far more abrupt southern margin comprising mainly Mesozoic limestones, and (iii) to the east, the Prebetic domain of the External Zone of the Betic Cordillera (Sierra de Cazorla), incised by the upper stream of the Guadalquivir River and composed of Mesozoic carbonates, predominantly dolostones in the study area.