Definition
Blueschist is a metamorphic rock which is generally blue in color and is formed under conditions of high pressure and low temperature
Gritstone or grit is a hard, coarse-grained, siliceous sandstone
History
Origin
USA
Pennines, England
Discoverer
Edgar Bailey
J.J. Ferber
Etymology
From French schiste, Greek skhistos i.e. split
From Grit + Stone
Class
Metamorphic Rocks
Sedimentary Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Hard Rock
Family
Group
-
-
Other Categories
Fine Grained Rock, Medium Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock