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Syenite
Syenite

Charnockite
Charnockite



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Syenite
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Charnockite
1 Definition
1.1 Definition
Syenite is a coarse-grained igneous rock which is composed mainly of alkali feldspar and various ferromagnesian minerals
Charnockite is a variety of granite containing minerals like orthopyroxene, quartz, and feldspar
1.2 History
1.2.1 Origin
Unknown
Tamil Nadu, India
1.2.2 Discoverer
Unknown
T. H. Holland
1.3 Etymology
From French syénite, from Latin Syenites (lapis ) (stone) of Syene
From Job Charnock, an administtrator of East India Company
1.4 Class
Igneous Rocks
Igneous Rocks
1.4.1 Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Hard Rock
1.5 Family
1.5.1 Group
Plutonic
Plutonic
1.6 Other Categories
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock