Definition
Tuff is a type of rock made of volcanic ash ejected from a vent during a volcanic eruption
Breccia is a rock consisting of angular fragments of stones which are cemented by finer calcareous material
History
Origin
Italy
England
Discoverer
Unknown
Unknown
Etymology
From a Latin word tophous then in Italian tufo and finally tuff
From Italian, literally gravel, Germanic origin and related to break
Class
Igneous Rocks
Sedimentary Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Hard Rock
Family
Group
Volcanic
-
Other Categories
Fine Grained Rock, Opaque Rock
Coarse Grained Rock, Medium Grained Rock, Opaque Rock