Any crystalline rock having a foliated structure (see Foliation) and hence admitting of ready division into slabs or slates. The common kinds are mica schist, and hornblendic schist, consisting chiefly of quartz with mica or hornblende and often feldspar.
metamorphic rock characterized by strong foliation or schistosity.
Any of a number of sorts of rocks having a structure of thin parallel plates or leaves and a tendency to become separated into them, formed from other rocks by heat and pressure acting on certain materials.
A crystalline metamorphic rock that can readily be split or cleaved due to its foliated or parallel structure developed by shearing and recrystallization under pressure.
A foliated metamorphic rock rich in mica.
This is a metamorphic rock. It has been affected by heat and pressure that has altered both the minerals and texture of the rock. The rocks in the Knockan Crag area are called Moine schists, named after Aâ€™Mhoine on the north coast. These rocks cover most of Sutherland and the middle of Ross-shire all the way south to the Great Glen. They were originally layers of sandstone and mudstone, which were heated up and compressed. They have been dated at about 1000 million years old.
A coarse-grained, strongly foliated metamorphic rock that develops from phyllite and splits easily into flat, parallel slabs. Type of metamorphic rock made up of parallel layers of flaky, micaceous minerals.
A medium-grained or coarse-grained metamorphic rock with strong foliation (schistosity) resulting from parallel orientation of platy minerals, such as mica, chlorite, and talc.
A strongly foliated (thinly layered) crystalline rock, formed through dynamic metamorphism, that has a well developed parallelism of the constituent minerals especially the micaceous or platy minerals.
A laminated, coarse crystalline metamorphic rock that can easily be split into slabs or flakes because more than 50 percent of its mineral grains are parallel to each other.
A medium- to coarse-grained metamorphic rock with strong foliation that results from a parallel orientation of platy minerals such as micas.
a metamorphic rock that is medium to coarse-grained rock that easily splits into layers; found in Alsace and Cote Rotie in the Rhone Valley. Viticulture/Grape Soil Terms- Dallas Bartenders; Beverage Catering
Fine-grained metamorphic rock that splits into thin flakes.
metamorphic rock type with a characteristic fabric
Light, silvery to dark, coarse- to very coarse-grained, strongly to very strongly layered metamorphic rock whose layering is typically defined by parallel alignment of micas. Primarily composed of mica, quartz, and feldspar; occasionally spotted with conspicuous garnets.
A metamorphic rock characterized by distinct layers of mineral grains (usually micas). Many schists were once shaley sediments that were buried, heated, then put under immense pressure.
A metamorphic rock characterized by abundant micaceous mineral development. The micas form on planar surfaces and separate the other minerals in the rock into bands, and this banding is called the rock's foliation.
a medium- to coarse-grained, foliated (layered) metamorphic rock created by regional metamorphism to medium or high temperatures and shearing pres-sures. Commonly, schists include quartz, feldspars, and micas, but mineral compo-sition is not an essential factor in its definition. Schists are strongly foliated, with well-developed parallelism of more than 50% of the minerals present.
A metamorphic rock characterised by a parallel arrangement of most of its minerals.
Foliated, high grade metamorphic rock
a strongly foliated crystalline metamorphic rock. The foliation results from alignment of micas. The term is often qualified by the name of the major mineral present in the rock e.g., biotite-schist, hornblende-schist.
A metamorphic rock, formed under regional metamorphic conditions, in which most of the minerals exhibit a parallel crystal orientation, resulting in a foliated fabric.
any metamorphic rock that can be split into thin layers
a rock that is foliated
_Type of metamorphic rock with layerings of mica.
Rock. A metamorphic rock characterized by strong foliation.
Any metamorphic crystalline rock having a foliated structure. It can easily be split into slabs or sheets.
a metamorphic rock consisting of parallel bands of micaceous minerals which can be split into thin layers along these planes; from French schiste, from Latin lapis schistos 'splittable stone', from Greek skhizein 'to split'.
Metamorphic rock with continuous foliation. Splits along foliation and is occasionally found in gravestone use.
Fine-grained rock, altered after formation by heat or pressure or both, so that mineral content is in roughly parallel layers. It can therefore be split into thin plates
A type of common metamorphic rock that shows foliation.
a course-grained metamorphic rock consisting of layers of different minerals and which can be split into thin irregular plates.
(2) -- laminated, easily splitting rock like slate (Vermeule, 387)
A type of metamorphic rock formed as older rocks recrystallize under heat and stress from pressure charactorized by a flaky layering of light and dark areas.
Metamorphic rock usually derived from fine-grained sedimentary rock such as shale. Individual minerals in schist have grown during metamorphism so that they are easily visible to the naked eye. Schists are named for their mineral constituents. For example, mica schist is conspicuously rich in mica such as biotite or muscovite.
A foliated metamorphic rock (recrystallized) characterized by thin foliae that are composed predominantly of minerals of thin platy or prismatic habits and whose long dimensions are oriented in approximately parallel positions along the planes of foliation. Because of this foliated structure schists split readily along these planes and so possess a pronounced rock cleavage. The more common schists are composed of the micas and other mica-like minerals (such as chlorite) and generally contain subordinate quartz and/or feldspar of comparatively fine-grained texture; all gradations exist between schist and gneiss (coarsely foliated feldspathic rocks).
A metamorphic rock containing abundant particles of mica, characterized by strong foliation, and originating from a metamorphism in which directed pressure plays a significant role.
a metamorphic rock with a foliated structure split up in thin irregular plates. Can range in particle size from clay (shale) to more coarse-grained rocks, the latter typically containing parallel orientation of micaceous (mica) minerals.
fine-grained metamorphic rock with laminations similar to slate
A medium-to-coarse-grained metamorphic rock that possesses schistosity.
any of various medium-grained to coarse-grained metamorphic rocks composed of laminated, often flaky parallel layers of chiefly micaceous minerals
a metamorphosed rock, generally the original rock was fine grained as silt/mud
A rock resulting from the metamorphism of a clay beyond the stage of slate and phyllite. Although dominated by glittering flat crystals of mica, some three dimensional crystals such as garnet form under this degree of heat and pressure, and these disrupt the 'slatiness' of the rock. Schists split along wavy shiny surfaces. They are common in the Grampian Highlands of Scotland.
A strongly foliated crystalline rock, formed by dynamic metamorphism that has well-developed parallelism of more than 50% of the minerals present, particularly those of lamellar or elongate prismatic habit, e.g. mica and hornblende.
Metamorphic rock with continuous foliation caused by the planar crystalline alignment of mica and other platy and lathlike minerals.
A metamorphic rock in foliated layers, the main bedrock of Manhattan.
Can be readily split into thin flakes or slabs due to more than 1/2 the minerals showing a well-developed parallelism.
(150) - Metamorphic rock characterized by a layered or foliated appearance (schistosity) cause by the planar alignment of platy minerals, such as mica together with quartz, and minor amounts of other minerals, like garnet.
A metamorphic crystalline rock which can be split along approximately parallel lines.
metamorphic epizonal fine-grained and foliated rock.
A metamorphed rock characterized by parallel arrangement of the bulk of its constituent minerals.
Schist is a type of crystalline metamorphic rock whose consistuent grains are in an organized pattern. Schist is formed from fine-grained sedimentary rocks like shale.
A crystalline metamorphic rock that can be readily split into thin flakes or slabs because of a strong foliation of the constituent minerals
A metamorphic rock defined by its well developed parallel orientation of more than 50% of the minerals present;
Flaky, metamorphic rock containing parallel layers of minerals such as mica.
A rock produced by the regional metamorphism of an original shale or mudstone. It is medium grained and ‘shiny' in appearance, produced by the sub-parallel arrangement of tiny mica crystals.
A rock similar in mineral composition to granite but the minerals is arranged in folia, alternate layers of quartz, feldspar and mica.
A large group of rocks that can be split into thin layers, as shale or slate can be. There are schists in the Douro Valley of northern Portugal, which is a controlled appellation.
a medium-grained metamorphic rock usually composed essentially of mica, that spits easily into layers. [AHDOS
The schists form a group of medium-grade metamorphic rocks, chiefly notable for the preponderance of lamellar minerals such as micas, chlorite, talc, hornblende, graphite, and others. Quartz often occurs in drawn-out grains to such an extent that a particular form called quartz schist is produced. By definition, schist contains more than 50% platy and elongated minerals, often finely interleaved with quartz and feldspar.