Definition
Pyrolite is an igneous rock consisting of about three parts of peridotite and one part of basalt
Tonalite is a coarse-grained plutonic rock consisting mainly of sodic plagioclase, quartz, and hornblende or other mafic minerals with phaneritic texture
History
Origin
Pike County, U.S
Tonale, Italy
Discoverer
Unknown
Warren Hamilton
Etymology
From the chemical and mineralogical composition of the upper mantle of the Earth
From Tonale Pass, northern Italy, + -ite1
Class
Igneous Rocks
Igneous Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Hard Rock
Family
Group
Plutonic
Plutonic
Other Categories
Coarse Grained Rock, Opaque Rock
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock