Definition
Banded iron formation are distinctive units of sedimentary rock that are almost always of Precambrian age
Anthracite is a type of sedimentary rock which is hard and is variety of coal that has high luster
History
Origin
Western Australia, Minnesota
Pennsylvania, U.S.
Discoverer
Johann Gottlob Lehmann
Unknown
Etymology
From its formation process
From Greek anthrakites, from anthrax, anthrak meaning coal
Class
Sedimentary Rocks
Metamorphic Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Soft Rock
Family
Group
-
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Other Categories
Coarse Grained Rock, Opaque Rock
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock