Definition
Gabbro is an intrusive igneous rock which is chemically equivalent to plutonic Basalt
Limestone is a sedimentary rock composed mostly of calcite and aragonite, which are different crystal forms of calcium carbonate
History
Origin
Germany
New Zealand
Discoverer
Christian Leopold von Buch
Belsazar Hacquet
Etymology
From Latin glaber bare, smooth, bald
From lime and stone in late 14th Century
Class
Igneous Rocks
Sedimentary Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Medium Hardness Rock
Family
Group
Plutonic
-
Other Categories
Coarse Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock