Definition
Trachyandesite is an extrusive igneous rock.
Travertine is a mineral consisting of layered calcium carbonate formed by deposition from spring waters
History
Origin
Indonesia
Italy
Discoverer
Unknown
Marcus Vitruvius Pollio
Etymology
From French trachyandésite, trachy + andésite andesite, a lava intermediate in composition between trachyte and andesite
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
Volcanic
-
Other Categories
Fine Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock