Definition
Arkose is a sedimentary rock, specifically a type of sandstone containing at least 25% feldspar
Travertine is a mineral consisting of layered calcium carbonate formed by deposition from spring waters
History
Origin
France
Italy
Discoverer
Alexandre Brongniart
Marcus Vitruvius Pollio
Etymology
From Auvergne region of France used by a French geologist Alexandre Brongniart in 1826 who applied this term to some feldspathic sandstones
From Italian travertino a kind of building stone, from Tiburs, adjective from Tibur (Tivoli), in Italy
Class
Sedimentary Rocks
Sedimentary Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Medium Hardness Rock
Family
Group
-
-
Other Categories
Coarse Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock