Greenschist
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Greenschists are metamorphic rocks that formed under the lowest temperatures and pressures usually produced by regional metamorphism, typically 300–450 °C and 2–10 kilobars. Greenschists commonly have
Chlorite schist, a type of greenschist
Greenschist (prasinite) at Cap Corse in Corsica, France
Greenschist (epidote) from Itogon, Benguet, Philippines
Prasinite variety of greenschist (Mont-Cenis massif, French Alps)
Blueschist
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Blueschist, also called glaucophane schist, is a metavolcanic rock that forms by the metamorphism of basalt and similar rocks at relatively low temperatures but very high pressure corresponding to a d
Greenschist
…ancient rocks are noted as host rocks for a variety of ore deposits in Australia, Namibia and Canada. Greenschist-like rocks can also be formed under blueschist facies conditions if the original rock (protolith) contains enough magnesium. This explains the scarcity of blueschist preserved from before the…
Blueschist on Île de Groix, France
Photomicrograph of a thin section of blueschist facies metamorphosed basalt, from Sivrihisar, Turkey
Photomicrograph of garnet-lawsonite-glaucophane blueschist from Sivrihisar, Turkey (Field of view is 3 mm)
Photomicrograph of blueschist facies quartz sediment, Sivrihisar, Turkey