Definition
Gabbro is an intrusive igneous rock which is chemically equivalent to plutonic Basalt
Travertine is a mineral consisting of layered calcium carbonate formed by deposition from spring waters
History
Origin
Germany
Italy
Discoverer
Christian Leopold von Buch
Marcus Vitruvius Pollio
Etymology
From Latin glaber bare, smooth, bald
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, Hard Rock
Durable Rock, Medium Hardness Rock
Family
Group
Plutonic
-
Other Categories
Coarse Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock