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Schist (/ ˈ ʃ ɪ s t / SHIST) is a medium-grained metamorphic rock showing pronounced schistosity (named for the rock). 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.
Chlorite schist, a type of greenschist Greenschist (prasinite) at Cap Corse in Corsica, France Greenschist (epidote) from Itogon, Benguet, Philippines. Greenschists are metamorphic rocks that formed under the lowest temperatures and pressures usually produced by regional metamorphism, typically 300–450 °C (570–840 °F) and 2–10 kilobars (29,000–145,000 psi). [1]
A whiteschist is an uncommon metamorphic rock formed at high to ultra-high pressures. It has the characteristic mineral assemblage of kyanite + talc , responsible for its white colour. The name was introduced in 1973 by German mineralogist and petrologist Werner Schreyer . [ 1 ]
The following is a list of rock types recognized by geologists.There is no agreed number of specific types of rock. Any unique combination of chemical composition, mineralogy, grain size, texture, or other distinguishing characteristics can describe a rock type.
Soapstone (also known as steatite or soaprock) is a talc-schist, which is a type of metamorphic rock. It is composed largely of the magnesium-rich mineral talc. It is produced by dynamothermal metamorphism and metasomatism, which occur in subduction zones, changing rocks by heat and pressure, with influx of fluids but without melting. It has ...
This category contains the geologic formations with a schist lithology. Pages in category "Schist formations" The following 11 pages are in this category, out of 11 ...
Pages in category "Schist" The following 5 pages are in this category, out of 5 total. This list may not reflect recent changes. ...
Isoclinally folded Bündner schists with alternating green (chlorite rich) and white (dolomite rich) layers. Location: Adula nappe, Lukmanier pass (Switzerland). The Bündner schist or Bündner slate (German: Bündnerschiefer; French: schistes lustrés) is a collective name for schistose rocks that form a number of geologic formations in the Penninic nappes of the Alps.