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