Definition
Origin
Discoverer
Etymology
Class
Sub-Class
Group
Other Categories
Limestone is a sedimentary rock composed mostly of calcite and aragonite, which are different crystal forms of calcium carbonate
From lime and stone in late 14th Century
Durable Rock, Medium Hardness Rock
Fine 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