Definition
Gritstone or grit is a hard, coarse-grained, siliceous sandstone
An iron rich extrusive rock found as a member of the alkali basalt magma series
History
Origin
Pennines, England
Isle of Mull, Scotland
Discoverer
J.J. Ferber
Ben More
Etymology
From Grit + Stone
From the name of discoverer, Ben More
Class
Sedimentary 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