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Gneiss

Index Gneiss

Gneiss is a common distributed type of rock formed by high-grade regional metamorphic processes from pre-existing formations that were originally either igneous or sedimentary rocks. [1]

48 relations: Albite, Archean, Augen, Baltic Shield, Biotite, Chlorite group, Coll, Dike (geology), Diorite, Felsic, Foliation (geology), Garnet, Granite, Igneous rock, Iron, Kyanite, Lens (geology), Lewisian complex, List of rock types, Loanword, Mafic, Magnesium, Marble, Matrix (geology), Metamorphic rock, Mica, Microcline, Middle High German, Mineral, Moine Thrust Belt, North Carolina, Outer Hebrides, Plane (geometry), Plasticity (physics), Porphyroclast, Proterozoic, Protolith, Quartzite, Recrystallization (geology), Rock (geology), Sandstone, Schist, Sedimentary rock, Shale, Silicate minerals, South Carolina, Tiree, W. H. Murray.

Albite

Albite is a plagioclase feldspar mineral.

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Archean

The Archean Eon (also spelled Archaean or Archæan) is one of the four geologic eons of Earth history, occurring (4 to 2.5 billion years ago).

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Augen

Augen (from German "eyes") are large, lenticular eye-shaped mineral grains or mineral aggregates visible in some foliated metamorphic rocks.

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Baltic Shield

The Baltic Shield (or Fennoscandian Shield) is a segment of the Earth's crust belonging to the East European Craton, representing a large part of Fennoscandia, northwestern Russia and the northern Baltic Sea.

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Biotite

Biotite is a common phyllosilicate mineral within the mica group, with the approximate chemical formula.

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Chlorite group

The chlorites are a group of phyllosilicate minerals.

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Coll

Coll (Cola)Mac an Tàilleir (2003) p. 31 is an island located west of Mull in the Inner Hebrides of Scotland.

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Dike (geology)

A dike or dyke, in geological usage, is a sheet of rock that is formed in a fracture in a pre-existing rock body.

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Diorite

Diorite is an intrusive igneous rock composed principally of the silicate minerals plagioclase feldspar (typically andesine), biotite, hornblende, and/or pyroxene.

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Felsic

In geology, felsic refers to igneous rocks that are relatively rich in elements that form feldspar and quartz.

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Foliation (geology)

Foliation in geology refers to repetitive layering in metamorphic rocks.

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Garnet

Garnets are a group of silicate minerals that have been used since the Bronze Age as gemstones and abrasives.

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Granite

Granite is a common type of felsic intrusive igneous rock that is granular and phaneritic in texture.

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Igneous rock

Igneous rock (derived from the Latin word ignis meaning fire), or magmatic rock, is one of the three main rock types, the others being sedimentary and metamorphic.

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Iron

Iron is a chemical element with symbol Fe (from ferrum) and atomic number 26.

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Kyanite

Kyanite is a typically blue silicate mineral, commonly found in aluminium-rich metamorphic pegmatites and/or sedimentary rock.

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Lens (geology)

In geology, a lens or lentil is a body of ore or rock that is thick in the middle and thin at the edges, resembling a convex lens in cross-section.

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Lewisian complex

The Lewisian complex or Lewisian gneiss is a suite of Precambrian metamorphic rocks that outcrop in the northwestern part of Scotland, forming part of the Hebridean Terrane and the North Atlantic Craton.

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List of rock types

The following is a list of rock types recognized by petrologists.

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Loanword

A loanword (also loan word or loan-word) is a word adopted from one language (the donor language) and incorporated into another language without translation.

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Mafic

Mafic is an adjective describing a silicate mineral or igneous rock that is rich in magnesium and iron, and is thus a portmanteau of magnesium and '''f'''err'''ic'''.

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Magnesium

Magnesium is a chemical element with symbol Mg and atomic number 12.

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Marble

Marble is a metamorphic rock composed of recrystallized carbonate minerals, most commonly calcite or dolomite.

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Matrix (geology)

The matrix or groundmass of rock is the finer-grained mass of material wherein larger grains, crystals or clasts are embedded.

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Metamorphic rock

Metamorphic rocks arise from the transformation of existing rock types, in a process called metamorphism, which means "change in form".

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Mica

The mica group of sheet silicate (phyllosilicate) minerals includes several closely related materials having nearly perfect basal cleavage.

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Microcline

Microcline (KAlSi3O8) is an important igneous rock-forming tectosilicate mineral.

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Middle High German

Middle High German (abbreviated MHG, Mittelhochdeutsch, abbr. Mhd.) is the term for the form of German spoken in the High Middle Ages.

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Mineral

A mineral is a naturally occurring chemical compound, usually of crystalline form and not produced by life processes.

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Moine Thrust Belt

The Moine Thrust Belt is a linear geological feature in the Scottish Highlands which runs from Loch Eriboll on the north coast south-west to the Sleat peninsula on the Isle of Skye.

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North Carolina

North Carolina is a U.S. state in the southeastern region of the United States.

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Outer Hebrides

The Outer Hebrides, also known as the Western Isles (Na h-Eileanan Siar or Na h-Eileanan an Iar), Innse Gall ("islands of the strangers") or the Long Isle or the Long Island (An t-Eilean Fada), is an island chain off the west coast of mainland Scotland.

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Plane (geometry)

In mathematics, a plane is a flat, two-dimensional surface that extends infinitely far.

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Plasticity (physics)

In physics and materials science, plasticity describes the deformation of a (solid) material undergoing non-reversible changes of shape in response to applied forces.

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Porphyroclast

autochthonous Western Gneiss Region and rocks of the allochthonous Blåhø nappe on Otrøy, Caledonides, Central Norway. A porphyroclast is a clast or mineral fragment in a metamorphic rock, surrounded by a groundmass of finer grained crystals.

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Proterozoic

The Proterozoic is a geological eon representing the time just before the proliferation of complex life on Earth.

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Protolith

A protolith is the original, unmetamorphosed rock from which a given metamorphic rock is formed (proto-: first; lithos: rock; both Greek).

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Quartzite

Quartzite (from Quarzit) is a hard, non-foliated metamorphic rock which was originally pure quartz sandstone.

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Recrystallization (geology)

In geology, solid-state recrystallization is a metamorphic process that occurs under temperature and pressure where atoms of a mineral are reorganized by diffusion and/or dislocation glide.

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Rock (geology)

Rock or stone is a natural substance, a solid aggregate of one or more minerals or mineraloids.

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Sandstone

Sandstone is a clastic sedimentary rock composed mainly of sand-sized (0.0625 to 2 mm) mineral particles or rock fragments.

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Schist

Schist (pronounced) is a medium-grade metamorphic rock with medium to large, flat, sheet-like grains in a preferred orientation (nearby grains are roughly parallel).

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Sedimentary rock

Sedimentary rocks are types of rock that are formed by the deposition and subsequent cementation of that material at the Earth's surface and within bodies of water.

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Shale

Shale is a fine-grained, clastic sedimentary rock composed of mud that is a mix of flakes of clay minerals and tiny fragments (silt-sized particles) of other minerals, especially quartz and calcite.

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Silicate minerals

Silicate minerals are rock-forming minerals with predominantly silicate anions.

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South Carolina

South Carolina is a U.S. state in the southeastern region of the United States.

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Tiree

Tiree (Tiriodh) is the most westerly island in the Inner Hebrides of Scotland.

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W. H. Murray

William Hutchison Murray (18 March 1913 – 19 March 1996) was a Scottish mountaineer and writer, one of a group of active mountain climbers, mainly from Clydeside, before and just after World War II.

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Redirects here:

Augen gneiss, Biotite gneiss, Compositional banding, Gneis, Gneisses, Gneissic, Gneissic banding, Gneissose, Gneiß, Gnejs, Gniess, Granite gneiss, Metamorphic differentiation, Orthogneiss, Paragneiss.

References

[1] https://en.wikipedia.org/wiki/Gneiss

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