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