Definition
Gabbro is an intrusive igneous rock which is chemically equivalent to plutonic Basalt
Eclogite is an extreme metamorphic rock, formed by regional metamorphism of basalt rock under very high pressure and temperature
History
Origin
Germany
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Discoverer
Christian Leopold von Buch
René Just Haüy
Etymology
From Latin glaber bare, smooth, bald
From French, Greek eklogē selection with reference to the selective content of the rock + -ite1
Class
Igneous Rocks
Metamorphic Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Medium Hardness Rock
Family
Group
Plutonic
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Other Categories
Coarse Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock