Definition
Dacite is a volcanic igneous rock which is rintermediate in composition between andesite and rhyolite
Banded iron formation are distinctive units of sedimentary rock that are almost always of Precambrian age
History
Origin
Romania and Moldova, Europe
Western Australia, Minnesota
Discoverer
Unknown
Johann Gottlob Lehmann
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 its formation process
Class
Igneous Rocks
Sedimentary Rocks
Sub-Class
Durable Rock, Soft Rock
Durable Rock, Medium Hardness Rock
Family
Group
Volcanic
-
Other Categories
Fine Grained Rock, Medium Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock