Definition
Rapakivi Granite is a hornblende-biotite Granite containing large rounded crystals of orthoclase which are mantled with oligoclase
Dunite is a green to brownish coarse-grained igneous rock mainly consisting of olivine
History
Origin
Finland, Europe
New Zealand
Discoverer
Jakob Sederholm
Ferdinand von Hochstetter
Etymology
From Finnish Rapakivi which stands for crumbly rock
From the name of Dun Mountain, New Zealand, + -ite1
Class
Igneous Rocks
Igneous Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Medium Hardness Rock
Family
Group
Plutonic
Plutonic
Other Categories
Coarse Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock