gneiss

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Related to Gneisses: Cambrian period, orthogneiss

gneiss

 (nīs)
n.
A banded or foliated metamorphic rock, usually of the same composition as granite.

[German Gneis, probably alteration of Middle High German ganeist, spark (from its appearance), from Old High German gneista.]

gneiss′ic (nī′sĭk), gneiss′oid′ (nī′soid′), gneiss′ose′ (nī′sōs′) adj.

gneiss

(naɪs)
n
(Geological Science) any coarse-grained metamorphic rock that is banded and foliated: represents the last stage in the metamorphism of rocks before melting
[C18: from German Gneis, probably from Middle High German ganeist spark; related to Old Norse gneista to give off sparks]
ˈgneissic, ˈgneissoid, ˈgneissose, gneiˈssitic adj

gneiss

(naɪs)

n.
a metamorphic rock, generally made up of bands that differ in color and composition, some bands being rich in feldspar and quartz, others rich in hornblende or mica.
[1750–60; < German Gneis, ultimately derivative of Old High German gneisto spark]
gneiss′ic, gneiss′oid, adj.

gneiss

(nīs)
A type of metamorphic rock consisting of light-colored layers, usually of quartz and feldspar, alternating with dark-colored layers of other minerals. The layers are often folded into curves. See Table at rock.

gneiss

A coarse-grained metamorphic rock with minerals in wavy layers.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.gneiss - a laminated metamorphic rock similar to granite
metamorphic rock - rock altered by pressure and heat
Translations
rula
gnejs
gneiss
gneissi
gnajs
gnejs
gnejs

gneiss

[naɪs] Ngneis m

gneiss

nGneis m
References in periodicals archive ?
Graphite in the vicinity is present in marbles in contact with quartzite and biotite gneiss and in shear zones within gneisses where the graphite content usually ranges from 3% to 10% Cg.
The company is currently completing a detailed gravity survey which will be used in conjunction with ground magnetic data to model the magnetite bearing gneisses prior to drilling.
The Charles Lake shear zone generally strikes north-south, following the alignment of the basement gneisses that run along the north shoreline of Lake Athabasca.
The rocks of the Tallinn zone vary from mafic amphibolite facies metavolcanites to metasediments represented by amphibole gneisses, biotite-plagioclase gneisses, quartz-feldspar gneisses, mica gneisses, and minor sulphide-graphite gneisses and magnetite quartzites (Jagala complex).
However, it is certain that metamorphism and deformation of gneisses north of the Isua greenstone predate 3490 Ma and that rocks adjacent to and within the greenstone belt were metamorphosed and deformed after 3490 Ma.
The densely populated Piedmont province, with its 500-million-year-old rock, and the Highlands province, with billion-year-old granites and gneisses, generate the most radon, especially where glacial deposits do not cover the bedrock, the team reports.
The gemstones are closely related to the contact between mafic schists and felsic gneisses and pegmatites.
The Khan Formation locally comprises infolded pelitic and calc-silicate gneisses, which are flanked by thick marble units of probable Karibib Formation.
The postorogenic granites and granite gneisses, mainly forming the crust above and around the upthrust blocks, are of nearly upper crust density, thus having only a minor influence on the gravity level.
1322 Ma Pants Lake Intrusion (PLI) comprises several mafic intrusions emplaced into sulphide-bearing metasedimentary gneisses, about 100 km south of the world-class Voisey's Bay Ni-Cu-Co deposit.
Drill targets have been generated through geological mapping and generally consist of areas where artisanal workings have exposed bedrock gold mineralization in sheared, shallow-dipping sections of garnetiferrous, quartzo-feldspathic and biotitic gneisses.