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 ?
Moreover, petrographic point count data indicates quartz-rich plutonic, upper and middle rank gneisses parent rocks for the Datta Formation.
It's great fun to try to figure out rock identities even as the water-polished pebbles afford an endless variety of gneisses, granitic rocks, schists, shales, black mudstones, and white quartzite.
The drilled part of the Archaean complex (6842-12261 m) is composed of biotite-plagioclase and biotite-amphibole-plagioclase gneisses with high-calcium minerals, gneisses with high-alumina minerals, amphibolite and metaultra-basic rocks, pegmatite and granite (Gorbatsevich, 2008).
According to the company, although graphite has been identified locally in marbles, graphite is also hosted here in quartz, biotite/mica gneisses and in calc-silicate gneisses.
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 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).
In the zone amphibolites, gneisses, tonalites and mica schists alternate frequently.
Electron microprobe analyses of samples from the Coal Hill vein prove all the elements essential to form the observed alpine minerals are present in the host gneisses.
The mineralisation at MacArthur River is structurally controlled by a fault and is of the unconformity type, at the contact between a series of gneisses and the Athabasca sandstones.
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.