Definition
Travertine is a mineral consisting of layered calcium carbonate formed by deposition from spring waters
Marl is an unconsolidated sedimentary rock consisting of clay and lime
History
Origin
Italy
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Discoverer
Marcus Vitruvius Pollio
William Smith
Etymology
From Italian travertino a kind of building stone, from Tiburs, adjective from Tibur (Tivoli), in Italy
From Old French marle, from Late Latin marglia
Class
Sedimentary Rocks
Sedimentary Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Soft Rock
Family
Group
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Other Categories
Fine Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock