Definition
Dacite is a volcanic igneous rock which is rintermediate in composition between andesite and rhyolite
Travertine is a mineral consisting of layered calcium carbonate formed by deposition from spring waters
History
Origin
Romania and Moldova, Europe
Italy
Discoverer
Unknown
Marcus Vitruvius Pollio
Etymology
From Dacia, a province of the Roman Empire which lay between the Danube River and Carpathian Mountains where the rock was first described
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, Soft Rock
Durable Rock, Medium Hardness Rock
Family
Group
Volcanic
-
Other Categories
Fine Grained Rock, Medium Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock