Definition
Aplite is a fine-grained granite composed mainly of feldspar and quartz
Rhyolite is a fine-grained igneous rock which is rich in silica
History
Origin
Iran
North America
Discoverer
Unknown
Ferdinand von Richthofen
Etymology
From German Aplit, from Greek haploos simple + -ite
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
Plutonic
Volcanic
Other Categories
Fine Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock