Definition
Tuff is a type of rock made of volcanic ash ejected from a vent during a volcanic eruption
Skarns are formed during regional or contact metamorphism and from a variety of metasomatic processes involving fluids of magmatic, metamorphic, and/or marine origin
History
Origin
Italy
USA, Australia
Discoverer
Unknown
Tornebohm
Etymology
From a Latin word tophous then in Italian tufo and finally tuff
From an old Swedish mining term originally used to describe a type of silicate gangue or waste rock.
Class
Igneous Rocks
Metamorphic Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Hard Rock
Family
Group
Volcanic
-
Other Categories
Fine Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock