Definition
Rhyolite is a fine-grained igneous rock which is rich in silica
A water-soluble mineral sediment resulting from concentration and crystallization by evaporation from an aqueous solution
History
Origin
North America
USA
Discoverer
Ferdinand von Richthofen
Usiglio
Etymology
From German Rhyolit, from Greek rhuax lava stream + lithos stone
From a sediment left after the evaporation
Class
Igneous Rocks
Sedimentary Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Soft Rock
Family
Group
Volcanic
-
Other Categories
Coarse Grained Rock, Opaque Rock
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock