Definition
Lignite is a soft brownish coal which shows traces of plants and is intermediate between bituminous coal and peat
Charnockite is a variety of granite containing minerals like orthopyroxene, quartz, and feldspar
History
Origin
France
Tamil Nadu, India
Discoverer
Unknown
T. H. Holland
Etymology
From French, Latin lignum wood + -ite1
From Job Charnock, an administtrator of East India Company
Class
Sedimentary Rocks
Igneous Rocks
Sub-Class
Durable Rock, Soft Rock
Durable Rock, Hard Rock
Family
Group
-
Plutonic
Other Categories
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock