Definition
Breccia is a rock consisting of angular fragments of stones which are cemented by finer calcareous material
Rhyolite is a fine-grained igneous rock which is rich in silica
Origin
England
North America
Discoverer
Unknown
Ferdinand von Richthofen
Etymology
From Italian, literally gravel, Germanic origin and related to break
From German Rhyolit, from Greek rhuax lava stream + lithos stone
Class
Sedimentary Rocks
Igneous Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Hard Rock
Other Categories
Coarse Grained Rock, Medium Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock