Definition
Mylonite is a metamorphic rock formed by ductile deformation during intense shearing encountered during folding and faulting, a process termed cataclastic or dynamic metamorphism
Gritstone or grit is a hard, coarse-grained, siliceous sandstone
History
Origin
New Zealand
Pennines, England
Discoverer
Unknown
J.J. Ferber
Etymology
From Greek mulōn mill + -ite
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, Opaque Rock
Coarse Grained Rock, Opaque Rock