1 Definition
1.1 Definition
Rhyolite is a fine-grained igneous rock which is rich in silica
1.2 History
1.2.1 Origin
North America
1.2.2 Discoverer
Ferdinand von Richthofen
1.3 Etymology
From German Rhyolit, from Greek rhuax lava stream + lithos stone
1.4 Class
Igneous Rocks
1.4.1 Sub-Class
Durable Rock, Hard Rock
1.5 Family
1.5.1 Group
Volcanic
1.6 Other Categories
Coarse Grained Rock, Opaque Rock