Definition
Larvikite is an igneous rock and a variety of monzonite, notable for the presence of thumbnail-sized crystals of feldspar
Diabase is a fine-grained igneous rock which is composed mostly of pyroxene and feldspar
History
Origin
Larvik, Norway
Germany
Discoverer
Unknown
Christian Leopold von Buch
Etymology
From the town of Larvik in Norway, where this type of igneous rock is found
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, Fine Grained Rock, Medium Grained Rock, Opaque Rock
Fine Grained Rock, Medium Grained Rock, Opaque Rock