Definition
Tuff is a type of rock made of volcanic ash ejected from a vent during a volcanic eruption
Mudstone is a fine-grained, dark gray sedimentary rock, which is formed from silt and clay and is similar to shale but has less laminations
History
Origin
Italy
-
Discoverer
Unknown
William Smith
Etymology
From a Latin word tophous then in Italian tufo and finally tuff
From the English mud and stone, from low German mudde and stainaz
Class
Igneous Rocks
Sedimentary Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Soft Rock
Family
Group
Volcanic
-
Other Categories
Fine Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock