A schist showing characteristic scaly schistose texture caused by platy micas
Schist (/ˈʃɪst/SHIST) is a medium-grained metamorphic rock showing pronounced schistosity. This means that the rock is composed of mineral grains easily seen with a low-power hand lens, oriented in such a way that the rock is easily split into thin flakes or plates. This texture reflects a high content of platy minerals, such as mica, talc, chlorite, or graphite. These are often interleaved with more granular minerals, such as feldspar or quartz.
Schist typically forms during regional metamorphism accompanying the process of mountain building (orogeny) and usually reflects a medium grade of metamorphism. Schist can form from many different kinds of rocks, including sedimentary rocks such as mudstones and igneous rocks such as tuffs. Schist metamorphosed from mudstone is particularly common and is often very rich in mica (a mica schist). Where the type of the original rock (the protolith) is discernible, the schist is usually given a name reflecting its protolith, such as schistose metasandstone. Otherwise, the names of the constituent minerals will be included in the rock name, such as quartz-felspar-biotite schist.
Schist bedrock can pose a challenge for civil engineering because of its pronounced planes of weakness.
Schist (/ˈʃɪst/ SHIST) is a medium-grained metamorphic rock showing pronounced schistosity. This means that the rock is composed of mineral grains easily...
Schistes is a genus of hummingbirds in the family Trochilidae. It was long considered to have only one species, the wedge-billed hummingbird but this species...
Manhattan consists of three rock formations: Fordham gneiss, Manhattan schist, and Tuckahoe marble (Inwood marble), which are well suited for the foundations...
The Brahma Schist consists of amphibolite, hornblende-biotite-plagioclase schist, biotite-plagioclase schist, orthoamphibole-bearing schist and gneiss...
The Haast Schist, which contains both the Alpine and Otago Schist, is a metamorphic unit in the South Island of New Zealand. It extends from Central Otago...
Schist Point (60°43′S 45°14′W / 60.717°S 45.233°W / -60.717; -45.233) is a conspicuous point at the west side of Divide Peaks on the south coast of...
The Catalina Schist is a metamorphic rock complex primarily exposed on Santa Catalina Island of the Channel Islands of California. It formed during the...
The "Schistes bitumineux" (French for Oil shale/Bituminous shale) is an Early Jurassic geologic formation in Bascharage, Luxembourg that is located within...
1832–present The oldest known human presence in Athens is the Cave of Schist, which has been dated to between the 11th and 7th millennia BC. Athens has...
of three rock formations: Inwood marble, Fordham gneiss, and Manhattan schist, and is well suited for the foundations of Manhattan's skyscrapers. It is...
basin. The bedrock underlying much of Manhattan is a mica schist known as Manhattan schist of the Manhattan Prong physiographic region. It is a strong...
carefully crafted natural stone vessel are unclear. The artifact, made of schist (a term previously used in Egyptology for weakly metamorphic siltstone)...
several units, such as Lower Pelitic Schist and Prettyboy Schist. The Wissahickon is described as a pelitic schist and gneiss with interlayers of quartzite...
dolomite and siderite also readily yield amphibolite (tremolite-schist, grunerite-schist, and others) especially where there has been a certain amount of...
layers, with less foliation than the mica schist. It weathers into a dark red soil. The texture of the mica schist is made up of heterogenous layers of minerals...
The Schistes de Fiennes is a geological formation in France. It preserves fossils dating back to the Devonian period. Earth sciences portal France portal...
metamorphic rock – A metamorphosed sandstone typically composed of >95% quartz Schist – Easily split medium-grained metamorphic rock Serpentinite – Rock formed...
Argillaceous schist is metamorphic rock which exhibits fine laminations of clay materials. Its protolith is argillite. Kontogianni, V.; Tzortzis, A.; Stiros...
Earth's crust. Some examples of metamorphic rocks are gneiss, slate, marble, schist, and quartzite. Slate and quartzite tiles are used in building construction...
New Mexico. These are mostly metarhyolite or quartzite units with some schist and amphibolite, and form a sequence in excess of 2,700 meters (8,900 ft)...
of two lithostratigraphic units: the Athens schist and the overlying Acropolis limestone. The Athens schist is a soft reddish rock dating from the late...
Kyanite Andalusite Sillimanite Kyanite occurs in biotite gneiss, mica schist, and hornfels, which are metamorphic rocks formed at high pressure during...
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