Definition
Marble is a non-foliated metamorphic rock which is composed of recrystallized carbonate which is formed when limestone is exposed to high temperatures and pressures over a long time
Rhyolite is a fine-grained igneous rock which is rich in silica
History
Origin
Egypt
North America
Discoverer
Unknown
Ferdinand von Richthofen
Etymology
From the Greek marmaros, shining stone and also from the English word marmoreal meaning marble-like
From German Rhyolit, from Greek rhuax lava stream + lithos stone
Class
Metamorphic Rocks
Igneous Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Hard Rock
Family
Group
-
Volcanic
Other Categories
Medium Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock