Definition
Rhyolite is a fine-grained igneous rock which is rich in silica
Kenyte is a variety of porphyritic phonolite or trachyte rock with rhomb shaped phenocrysts of anorthoclase with variable olivine and augite in a glassy matrix
History
Origin
North America
Mount Kenya
Discoverer
Ferdinand von Richthofen
J. W. Gregory
Etymology
From German Rhyolit, from Greek rhuax lava stream + lithos stone
From the mountain ranges- Mount Kenya and is named by J. W. Gregory in 1900
Class
Igneous Rocks
Igneous Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Medium Hardness Rock
Family
Group
Volcanic
-
Other Categories
Coarse Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock