Definition
Blueschist is a metamorphic rock which is generally blue in color and is formed under conditions of high pressure and low temperature
Diabase is a fine-grained igneous rock which is composed mostly of pyroxene and feldspar
History
Origin
USA
Germany
Discoverer
Edgar Bailey
Christian Leopold von Buch
Etymology
From French schiste, Greek skhistos i.e. split
From Greek di + base
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
Fine Grained Rock, Medium Grained Rock, Opaque Rock