Definition
Gabbro is an intrusive igneous rock which is chemically equivalent to plutonic Basalt
Peridotite is a dense, coarse-grained plutonic is the main constituent of the earth's mantle
History
Origin
Germany
Pike County, U.S
Discoverer
Christian Leopold von Buch
Unknown
Etymology
From Latin glaber bare, smooth, bald
From French, from peridot + -ite
Class
Igneous Rocks
Igneous Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Medium Hardness Rock
Family
Group
Plutonic
Plutonic
Other Categories
Coarse Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock