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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.
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 ]
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]
Download as PDF; Printable version; In other projects ... This page is intended to be a list of rock textural and morphological terms. A. Adcumulate ...
Print/export Download as PDF; Printable version; In other projects ... Pages in category "Schist" The following 5 pages are in this category, out of 5 total. ...
The Moppin Complex consists mostly of chlorite schist (greenschist) and amphibolite, [1] but with lesser amounts of many other rock types, including metaconglomerate, phyllite, gneiss, [1] and muscovite schist. [2] Feldspathic schist [3] and banded iron formation [3] [2] are also present.
Then, the rock was buried underneath subsequent rock and was subjected to high pressures and temperatures, causing the rock to recrystallize. The overall composition of a metasedimentary rock can be used to identify the original sedimentary rock, even where they have been subject to high-grade metamorphism and intense deformation. [1]
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, along the eastern side of the Alpine Fault to Cook Strait. [1] There are also isolated outcrops of the Haast Schist within the central North Island.
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