Definition
Dacite is a volcanic igneous rock which is rintermediate in composition between andesite and rhyolite
Diabase is a fine-grained igneous rock which is composed mostly of pyroxene and feldspar
History
Origin
Romania and Moldova, Europe
Germany
Discoverer
Unknown
Christian Leopold von Buch
Etymology
From Dacia, a province of the Roman Empire which lay between the Danube River and Carpathian Mountains where the rock was first described
From Greek di + base
Class
Igneous Rocks
Igneous Rocks
Sub-Class
Durable Rock, Soft Rock
Durable Rock, Hard Rock
Family
Group
Volcanic
Volcanic
Other Categories
Fine Grained Rock, Medium Grained Rock, Opaque Rock
Fine Grained Rock, Medium Grained Rock, Opaque Rock