Definition
Gabbro is an intrusive igneous rock which is chemically equivalent to plutonic Basalt
Tuff is a type of rock made of volcanic ash ejected from a vent during a volcanic eruption
History
Origin
Germany
Italy
Discoverer
Christian Leopold von Buch
Unknown
Etymology
From Latin glaber bare, smooth, bald
From a Latin word tophous then in Italian tufo and finally tuff
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