Definition
Limestone is a sedimentary rock composed mostly of calcite and aragonite, which are different crystal forms of calcium carbonate
Rhyolite is a fine-grained igneous rock which is rich in silica
History
Origin
New Zealand
North America
Discoverer
Belsazar Hacquet
Ferdinand von Richthofen
Etymology
From lime and stone in late 14th Century
From German Rhyolit, from Greek rhuax lava stream + lithos stone
Class
Sedimentary Rocks
Igneous Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Hard Rock
Family
Group
-
Volcanic
Other Categories
Fine Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock