Definition
Diabase is a fine-grained igneous rock which is composed mostly of pyroxene and feldspar
Rhyolite is a fine-grained igneous rock which is rich in silica
History
Origin
Germany
North America
Discoverer
Christian Leopold von Buch
Ferdinand von Richthofen
Etymology
From Greek di + base
From German Rhyolit, from Greek rhuax lava stream + lithos stone
Class
Igneous Rocks
Igneous Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Hard Rock
Family
Group
Volcanic
Volcanic
Other Categories
Fine Grained Rock, Medium Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock