Definition
Ignimbrite is a volcanic rock consisting mainly of pumice fragments, formed by the consolidation of material deposited by pyroclastic flows
Rhyolite is a fine-grained igneous rock which is rich in silica
History
Origin
New Zealand
North America
Discoverer
Patrick Marshall
Ferdinand von Richthofen
Etymology
From Latin ignis fire + imber, imbr- shower of rain, storm cloud + -ite
From German Rhyolit, from Greek rhuax lava stream + lithos stone
Class
Igneous Rocks
Igneous Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Hard Rock
Family
Group
Volcanic
Volcanic
Other Categories
Fine Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock