Definition
Travertine is a mineral consisting of layered calcium carbonate formed by deposition from spring waters
Gritstone or grit is a hard, coarse-grained, siliceous sandstone
History
Origin
Italy
Pennines, England
Discoverer
Marcus Vitruvius Pollio
J.J. Ferber
Etymology
From Italian travertino a kind of building stone, from Tiburs, adjective from Tibur (Tivoli), in Italy
From Grit + Stone
Class
Sedimentary Rocks
Sedimentary Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Hard Rock
Family
Group
-
-
Other Categories
Fine Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock