Definition
Taconite is a low-grade iron ore which belongs to sedimentary rock and containing about 27% iron and 51% silica
Gabbro is an intrusive igneous rock which is chemically equivalent to plutonic Basalt
History
Origin
Western Australia, Minnesota
Germany
Discoverer
Newton Horace Winchell
Christian Leopold von Buch
Etymology
From the name of Taconic Mountains in New England
From Latin glaber bare, smooth, bald
Class
Sedimentary Rocks
Igneous Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Hard Rock
Family
Group
-
Plutonic
Other Categories
Coarse Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock