Definition
Norite is a mafic intrusive igneous rock composed largely of the calcium-rich plagioclase labradorite, orthopyroxene, and olivine
Diabase is a fine-grained igneous rock which is composed mostly of pyroxene and feldspar
History
Origin
Norway
Germany
Discoverer
Unknown
Christian Leopold von Buch
Etymology
From the Norwegian name for Norway, Norge
From Greek di + base
Class
Igneous Rocks
Igneous Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Hard Rock
Family
Group
Plutonic
Volcanic
Other Categories
Coarse Grained Rock, Opaque Rock
Fine Grained Rock, Medium Grained Rock, Opaque Rock