Definition
Very fine grained fault rock which is composed of glassy matrix that often contains inclusions of wall-rock fragments.
Charnockite is a variety of granite containing minerals like orthopyroxene, quartz, and feldspar
History
Origin
USA
Tamil Nadu, India
Discoverer
Unknown
T. H. Holland
Etymology
From pseudo- + tachylite, a glassy rock generated by frictional heat within faults.
From Job Charnock, an administtrator of East India Company
Class
Metamorphic Rocks
Igneous Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Hard Rock
Family
Group
-
Plutonic
Other Categories
Fine Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock