Definition
Gabbro is an intrusive igneous rock which is chemically equivalent to plutonic Basalt
Basalt is a common extrusive igneous rock formed by the rapid cooling of basaltic lava exposed at or very near the surface of Earth
History
Origin
Germany
Egypt
Discoverer
Christian Leopold von Buch
Georgius Agricola
Etymology
From Latin glaber bare, smooth, bald
From Late Latin Basaltes (variant of basanites ), very hard stone, which was imported from Ancient Greek Basanites
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
Fine Grained Rock, Opaque Rock