Definition
Gabbro is an intrusive igneous rock which is chemically equivalent to plutonic Basalt
Hawaiite is volcanic rock that resembles basalt. It is an olivine basalt with intermediate composition between alkali olivine and mugearite
History
Origin
Germany
Hawaii Islands
Discoverer
Christian Leopold von Buch
Joseph Iddings
Etymology
From Latin glaber bare, smooth, bald
From Hawaii Islands
Class
Igneous Rocks
Igneous Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Medium Hardness Rock
Family
Group
Plutonic
Volcanic
Other Categories
Coarse Grained Rock, Opaque Rock
Opaque Rock