Definition
Origin
Discoverer
Etymology
Class
Sub-Class
Group
Other Categories
Pyrolite is an igneous rock consisting of about three parts of peridotite and one part of basalt
From the chemical and mineralogical composition of the upper mantle of the Earth
Durable Rock, Medium Hardness Rock
Coarse Grained Rock, Opaque Rock
Dacite is a volcanic igneous rock which is rintermediate in composition between andesite and rhyolite
Romania and Moldova, Europe
From Dacia, a province of the Roman Empire which lay between the Danube River and Carpathian Mountains where the rock was first described
Fine Grained Rock, Medium Grained Rock, Opaque Rock