Definition
Rapakivi Granite is a hornblende-biotite Granite containing large rounded crystals of orthoclase which are mantled with oligoclase
Charnockite is a variety of granite containing minerals like orthopyroxene, quartz, and feldspar
History
Origin
Finland, Europe
Tamil Nadu, India
Discoverer
Jakob Sederholm
T. H. Holland
Etymology
From Finnish Rapakivi which stands for crumbly rock
From Job Charnock, an administtrator of East India Company
Class
Igneous Rocks
Igneous Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Hard Rock
Family
Group
Plutonic
Plutonic
Other Categories
Coarse Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock