Definition
Arkose is a sedimentary rock, specifically a type of sandstone containing at least 25% feldspar
Taconite is a low-grade iron ore which belongs to sedimentary rock and containing about 27% iron and 51% silica
History
Origin
France
Western Australia, Minnesota
Discoverer
Alexandre Brongniart
Newton Horace Winchell
Etymology
From Auvergne region of France used by a French geologist Alexandre Brongniart in 1826 who applied this term to some feldspathic sandstones
From the name of Taconic Mountains in New England
Class
Sedimentary Rocks
Sedimentary Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Medium Hardness Rock
Family
Group
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Other Categories
Coarse Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock