Definition
Tuff is a type of rock made of volcanic ash ejected from a vent during a volcanic eruption
Cataclasite is a type of cataclastic rock that is formed by fracturing and comminution during faulting. It is normally cohesive and non-foliated, consisting of angular clasts in a finer-grained matrix
History
Origin
Italy
Swiss Alps, Europe
Discoverer
Unknown
Michael Tellinger
Etymology
From a Latin word tophous then in Italian tufo and finally tuff
From the Italian word cataclasi
Class
Igneous Rocks
Metamorphic Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Medium Hardness Rock
Family
Group
Volcanic
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Other Categories
Fine Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock