Definition
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Discoverer
Etymology
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Other Categories
Greenschist is a metamorphic rock that is formed under lowest temperatures and pressures and is usually produced by regional metamorphism
From minerals such as chlorite, serpentine, and epidote, and platy minerals such as muscovite and platy serpentine which are green in color
Durable Rock, Medium Hardness Rock
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock
Marl is an unconsolidated sedimentary rock consisting of clay and lime
From Old French marle, from Late Latin marglia
Fine Grained Rock, Opaque Rock