Definition
Trachyandesite is an extrusive igneous rock.
Charnockite is a variety of granite containing minerals like orthopyroxene, quartz, and feldspar
History
Origin
Indonesia
Tamil Nadu, India
Discoverer
Unknown
T. H. Holland
Etymology
From French trachyandésite, trachy + andésite andesite, a lava intermediate in composition between trachyte and andesite
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