Definition
Icelandite belongs to volcanic igneous rocks which is rich in iron and belongs to andesite rock
Rhyolite is a fine-grained igneous rock which is rich in silica
History
Origin
Iceland
North America
Discoverer
Ian S. E. Carmichael
Ferdinand von Richthofen
Etymology
From its origin place near Cenozoic volcano near the parsonage Þingmúli in East Iceland
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, Opaque Rock
Coarse Grained Rock, Opaque Rock