Definition
Andesite is a dark, fine-grained, brown or greyish intermediate volcanic rock which is a commonly found in lava
Dunite is a green to brownish coarse-grained igneous rock mainly consisting of olivine
History
Origin
North America
New Zealand
Discoverer
Theodor von Gümbel
Ferdinand von Hochstetter
Etymology
From Andes mountains, where it is found in abundance
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
Volcanic
Plutonic
Other Categories
Fine Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock