Definition
Blueschist is a metamorphic rock which is generally blue in color and is formed under conditions of high pressure and low temperature
Rhyolite is a fine-grained igneous rock which is rich in silica
History
Origin
USA
North America
Discoverer
Edgar Bailey
Ferdinand von Richthofen
Etymology
From French schiste, Greek skhistos i.e. split
From German Rhyolit, from Greek rhuax lava stream + lithos stone
Class
Metamorphic Rocks
Igneous Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Hard Rock
Family
Group
-
Volcanic
Other Categories
Fine Grained Rock, Medium Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock