Definition
Pyrolite is an igneous rock consisting of about three parts of peridotite and one part of basalt
Blueschist is a metamorphic rock which is generally blue in color and is formed under conditions of high pressure and low temperature
History
Origin
Pike County, U.S
USA
Discoverer
Unknown
Edgar Bailey
Etymology
From the chemical and mineralogical composition of the upper mantle of the Earth
From French schiste, Greek skhistos i.e. split
Class
Igneous Rocks
Metamorphic Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Medium Hardness Rock
Family
Group
Plutonic
-
Other Categories
Coarse Grained Rock, Opaque Rock
Fine Grained Rock, Medium Grained Rock, Opaque Rock