Definition
Tuff is a type of rock made of volcanic ash ejected from a vent during a volcanic eruption
Jaspillite is an iron rich chemically formed rock which is common in banded iron formation rocks
History
Origin
Italy
Western Australia, Minnesota
Discoverer
Unknown
Unknown
Etymology
From a Latin word tophous then in Italian tufo and finally tuff
From Jaspilite (Mineral), a compact siliceous rock which resembles jasper
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
Coarse Grained Rock, Opaque Rock