Definition
Ignimbrite is a volcanic rock consisting mainly of pumice fragments, formed by the consolidation of material deposited by pyroclastic flows
Travertine is a mineral consisting of layered calcium carbonate formed by deposition from spring waters
History
Origin
New Zealand
Italy
Discoverer
Patrick Marshall
Marcus Vitruvius Pollio
Etymology
From Latin ignis fire + imber, imbr- shower of rain, storm cloud + -ite
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
Volcanic
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Other Categories
Fine Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock