Definition
An iron rich extrusive rock found as a member of the alkali basalt magma series
Gritstone or grit is a hard, coarse-grained, siliceous sandstone
History
Origin
Isle of Mull, Scotland
Pennines, England
Discoverer
Ben More
J.J. Ferber
Etymology
From the name of discoverer, Ben More
From Grit + Stone
Class
Igneous Rocks
Sedimentary Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Hard Rock
Family
Group
Volcanic
-
Other Categories
Fine Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock