Definition
It is a metamorphic magnesium rich rock because it is composed of the mineral talc
Blueschist is a metamorphic rock which is generally blue in color and is formed under conditions of high pressure and low temperature
History
Origin
USA
USA
Discoverer
Unknown
Edgar Bailey
Etymology
From 17th century, because of its greasy feel and use like a soap
From French schiste, Greek skhistos i.e. split
Class
Metamorphic Rocks
Metamorphic Rocks
Sub-Class
Durable Rock, Soft Rock
Durable Rock, Medium Hardness Rock
Family
Group
-
-
Other Categories
Fine Grained Rock, Opaque Rock
Fine Grained Rock, Medium Grained Rock, Opaque Rock