Definition
Blueschist is a metamorphic rock which is generally blue in color and is formed under conditions of high pressure and low temperature
Charnockite is a variety of granite containing minerals like orthopyroxene, quartz, and feldspar
History
Origin
USA
Tamil Nadu, India
Discoverer
Edgar Bailey
T. H. Holland
Etymology
From French schiste, Greek skhistos i.e. split
From Job Charnock, an administtrator of East India Company
Class
Metamorphic Rocks
Igneous Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Hard Rock
Family
Group
-
Plutonic
Other Categories
Fine Grained Rock, Medium Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock