Definition
Taconite is a low-grade iron ore which belongs to sedimentary rock and containing about 27% iron and 51% silica
Rhyolite is a fine-grained igneous rock which is rich in silica
History
Origin
Western Australia, Minnesota
North America
Discoverer
Newton Horace Winchell
Ferdinand von Richthofen
Etymology
From the name of Taconic Mountains in New England
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
Coarse Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock