Definition
Anorthosite is a granular igneous rock composed largely of labradorite or plagioclase
Icelandite belongs to volcanic igneous rocks which is rich in iron and belongs to andesite rock
History
Origin
-
Iceland
Discoverer
Unknown
Ian S. E. Carmichael
Etymology
From French anorthose plagioclase + -ite1
From its origin place near Cenozoic volcano near the parsonage Þingmúli in East Iceland
Class
Igneous Rocks
Igneous Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Hard Rock
Family
Group
Plutonic
Volcanic
Other Categories
Coarse Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock