1 Definition
1.1 Definition
Taconite is a low-grade iron ore which belongs to sedimentary rock and containing about 27% iron and 51% silica
Borolanite is a variety of Nepheline Syenite and belongs to igneous rocks and contains nepheline-alkali feldspar pseudomorphs which occur as conspicuous white spots in the dark rock matrix
1.2 History
1.2.1 Origin
Western Australia, Minnesota
Scotland
1.2.2 Discoverer
Newton Horace Winchell
Unknown
1.3 Etymology
From the name of Taconic Mountains in New England
From Alkalic Igneous complex near Loch Borralan in northwest Scotland
1.4 Class
Sedimentary Rocks
Igneous Rocks
1.4.1 Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Medium Hardness Rock
1.5 Family
1.5.1 Group
1.6 Other Categories
Coarse Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock