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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]
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.
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 ]
Download as PDF; Printable version; In other projects Wikimedia Commons; ... Pages in category "Schist" The following 5 pages are in this category, out of 5 total.
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.
Where the schist is heavily micaceous and easily eroded, the ground surface is covered with weathered-out staurolite crystals. [ 6 ] [ 5 ] This member includes spotty basal andalusite - biotite hornfels , from 65 meters (213 feet) to 120 meters (390 feet) thick, consisting of biotite crystals up to 1 centimetre (0.39 inches) in size in a ...
Download QR code; Print/export Download as PDF; Printable version; In other projects ... This page is intended to be a list of rock textural and morphological terms ...
Wissahickon schist is quarried as a building stone and is used primarily as a decorative stone rather than a weight bearing stone. However, there are numerous old buildings in the Philadelphia area that are constructed almost entirely of this rock.