Definition
Banded iron formation are distinctive units of sedimentary rock that are almost always of Precambrian age
Granite is a very hard, granular, crystalline igneous rock which consists mainly of quartz, mica, and feldspar and is often used as building stone
History
Origin
Western Australia, Minnesota
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Discoverer
Johann Gottlob Lehmann
Alexander von Humboldt
Etymology
From its formation process
From Italian granito, which means grained rock, from grano grain, and from Latin granum
Class
Sedimentary Rocks
Igneous Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Hard Rock
Family
Group
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Plutonic
Other Categories
Coarse Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock