Definition
Gabbro is an intrusive igneous rock which is chemically equivalent to plutonic Basalt
Migmatite is typically a granitic rock within a metamorphic host rock which is composed of two intermingled but distinguishable components
History
Origin
Germany
Southern Alps, France
Discoverer
Christian Leopold von Buch
Jakob Sederholm
Etymology
From Latin glaber bare, smooth, bald
From the Greek word migma which means a mixture
Class
Igneous Rocks
Metamorphic Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Medium Hardness Rock
Family
Group
Plutonic
-
Other Categories
Coarse Grained Rock, Opaque Rock
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock