Definition
Gabbro is an intrusive igneous rock which is chemically equivalent to plutonic Basalt
Icelandite belongs to volcanic igneous rocks which is rich in iron and belongs to andesite rock
History
Origin
Germany
Iceland
Discoverer
Christian Leopold von Buch
Ian S. E. Carmichael
Etymology
From Latin glaber bare, smooth, bald
From its origin place near Cenozoic volcano near the parsonage Þingmúli in East Iceland
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, Opaque Rock