Definition
Shonkinite is a rare, dark-coloured and intrusive igneous rock which contains augite and orthoclase feldspar as its primary constituents
Travertine is a mineral consisting of layered calcium carbonate formed by deposition from spring waters
History
Origin
USA
Italy
Discoverer
Unknown
Marcus Vitruvius Pollio
Etymology
From the name of Shonkin Sag ranges in the Highwood Mountains of north-central Montana, US
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
-
-
Other Categories
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock