Definition
Diabase is a fine-grained igneous rock which is composed mostly of pyroxene and feldspar
Tuff is a type of rock made of volcanic ash ejected from a vent during a volcanic eruption
History
Origin
Germany
Italy
Discoverer
Christian Leopold von Buch
Unknown
Etymology
From Greek di + base
From a Latin word tophous then in Italian tufo and finally tuff
Class
Igneous Rocks
Igneous Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Medium Hardness Rock
Family
Group
Volcanic
Volcanic
Other Categories
Fine Grained Rock, Medium Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock