Definition
Pyrolite is an igneous rock consisting of about three parts of peridotite and one part of basalt
Tuff is a type of rock made of volcanic ash ejected from a vent during a volcanic eruption
History
Origin
Pike County, U.S
Italy
Discoverer
Unknown
Unknown
Etymology
From the chemical and mineralogical composition of the upper mantle of the Earth
From a Latin word tophous then in Italian tufo and finally tuff
Class
Igneous Rocks
Igneous Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Medium Hardness Rock
Family
Group
Plutonic
Volcanic
Other Categories
Coarse Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock