Definition
Rhyolite is a fine-grained igneous rock which is rich in silica
Dolomite is a sedimentary rock containing more than 50 percent of the mineral dolomite by weight
History
Origin
North America
Southern Alps, France
Discoverer
Ferdinand von Richthofen
Dolomieu
Etymology
From German Rhyolit, from Greek rhuax lava stream + lithos stone
From French, from the name of Dolomieu (1750–1801), the French geologist who discovered the rock
Class
Igneous Rocks
Sedimentary Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Medium Hardness Rock
Family
Group
Volcanic
-
Other Categories
Coarse Grained Rock, Opaque Rock
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock