Definition
Pyrolite is an igneous rock consisting of about three parts of peridotite and one part of basalt
Travertine is a mineral consisting of layered calcium carbonate formed by deposition from spring waters
History
Origin
Pike County, U.S
Italy
Discoverer
Unknown
Marcus Vitruvius Pollio
Etymology
From the chemical and mineralogical composition of the upper mantle of the Earth
From Italian travertino a kind of building stone, from Tiburs, adjective from Tibur (Tivoli), in Italy
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
Fine Grained Rock, Opaque Rock