Definition
Charnockite is a variety of granite containing minerals like orthopyroxene, quartz, and feldspar
Ignimbrite is a volcanic rock consisting mainly of pumice fragments, formed by the consolidation of material deposited by pyroclastic flows
History
Origin
Tamil Nadu, India
New Zealand
Discoverer
T. H. Holland
Patrick Marshall
Etymology
From Job Charnock, an administtrator of East India Company
From Latin ignis fire + imber, imbr- shower of rain, storm cloud + -ite
Class
Igneous Rocks
Igneous Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Medium Hardness Rock
Family
Group
Plutonic
Volcanic
Other Categories
Coarse Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock