Definition
Norite is a mafic intrusive igneous rock composed largely of the calcium-rich plagioclase labradorite, orthopyroxene, and olivine
Gritstone or grit is a hard, coarse-grained, siliceous sandstone
History
Origin
Norway
Pennines, England
Discoverer
Unknown
J.J. Ferber
Etymology
From the Norwegian name for Norway, Norge
From Grit + Stone
Class
Igneous Rocks
Sedimentary Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Hard Rock
Family
Group
Plutonic
-
Other Categories
Coarse Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock