Definition
Aplite is a fine-grained granite composed mainly of feldspar and quartz
Taconite is a low-grade iron ore which belongs to sedimentary rock and containing about 27% iron and 51% silica
History
Origin
Iran
Western Australia, Minnesota
Discoverer
Unknown
Newton Horace Winchell
Etymology
From German Aplit, from Greek haploos simple + -ite
From the name of Taconic Mountains in New England
Class
Igneous Rocks
Sedimentary Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Medium Hardness Rock
Family
Group
Plutonic
-
Other Categories
Fine Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock