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