Definition
Pyrolite is an igneous rock consisting of about three parts of peridotite and one part of basalt
Eclogite is an extreme metamorphic rock, formed by regional metamorphism of basalt rock under very high pressure and temperature
History
Origin
Pike County, U.S
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Discoverer
Unknown
René Just Haüy
Etymology
From the chemical and mineralogical composition of the upper mantle of the Earth
From French, Greek eklogē selection with reference to the selective content of the rock + -ite1
Class
Igneous Rocks
Metamorphic Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Medium Hardness Rock
Family
Group
Plutonic
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Other Categories
Coarse Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock