Definition
Banded iron formation are distinctive units of sedimentary rock that are almost always of Precambrian age
Travertine is a mineral consisting of layered calcium carbonate formed by deposition from spring waters
History
Origin
Western Australia, Minnesota
Italy
Discoverer
Johann Gottlob Lehmann
Marcus Vitruvius Pollio
Etymology
From its formation process
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, Medium Hardness Rock
Durable Rock, Medium Hardness Rock
Family
Group
-
-
Other Categories
Coarse Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock