Definition
Pyrolite is an igneous rock consisting of about three parts of peridotite and one part of basalt
Taconite is a low-grade iron ore which belongs to sedimentary rock and containing about 27% iron and 51% silica
History
Origin
Pike County, U.S
Western Australia, Minnesota
Discoverer
Unknown
Newton Horace Winchell
Etymology
From the chemical and mineralogical composition of the upper mantle of the Earth
From the name of Taconic Mountains in New England
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