Definition
Dacite is a volcanic igneous rock which is rintermediate in composition between andesite and rhyolite
Anthracite is a type of sedimentary rock which is hard and is variety of coal that has high luster
History
Origin
Romania and Moldova, Europe
Pennsylvania, U.S.
Discoverer
Unknown
Unknown
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 anthrakites, from anthrax, anthrak meaning coal
Class
Igneous Rocks
Metamorphic Rocks
Sub-Class
Durable Rock, Soft Rock
Durable Rock, Soft Rock
Family
Group
Volcanic
-
Other Categories
Fine Grained Rock, Medium Grained Rock, Opaque Rock
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock