Definition
Banded iron formation are distinctive units of sedimentary rock that are almost always of Precambrian age
Pyrolite is an igneous rock consisting of about three parts of peridotite and one part of basalt
History
Origin
Western Australia, Minnesota
Pike County, U.S
Discoverer
Johann Gottlob Lehmann
Unknown
Etymology
From its formation process
From the chemical and mineralogical composition of the upper mantle of the Earth
Class
Sedimentary Rocks
Igneous Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Medium Hardness Rock
Family
Group
-
Plutonic
Other Categories
Coarse Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock