Definition
Charnockite is a variety of granite containing minerals like orthopyroxene, quartz, and feldspar
Slate is a fine-grained, foliated, homogeneous metamorphic rock derived from an original shale-type sedimentary rock composed of clay or volcanic ash through low-grade regional metamorphism
History
Origin
Tamil Nadu, India
England
Discoverer
T. H. Holland
Abraham Gottlob Werner
Etymology
From Job Charnock, an administtrator of East India Company
From Old French esclate, from esclat (French éclat)
Class
Igneous Rocks
Metamorphic Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Medium Hardness Rock
Family
Group
Plutonic
-
Other Categories
Coarse Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock