Definition
Banded iron formation are distinctive units of sedimentary rock that are almost always of Precambrian age
Charnockite is a variety of granite containing minerals like orthopyroxene, quartz, and feldspar
History
Origin
Western Australia, Minnesota
Tamil Nadu, India
Discoverer
Johann Gottlob Lehmann
T. H. Holland
Etymology
From its formation process
From Job Charnock, an administtrator of East India Company
Class
Sedimentary Rocks
Igneous Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Hard Rock
Family
Group
-
Plutonic
Other Categories
Coarse Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock