Definition
Marble is a non-foliated metamorphic rock which is composed of recrystallized carbonate which is formed when limestone is exposed to high temperatures and pressures over a long time
Taconite is a low-grade iron ore which belongs to sedimentary rock and containing about 27% iron and 51% silica
History
Origin
Egypt
Western Australia, Minnesota
Discoverer
Unknown
Newton Horace Winchell
Etymology
From the Greek marmaros, shining stone and also from the English word marmoreal meaning marble-like
From the name of Taconic Mountains in New England
Class
Metamorphic Rocks
Sedimentary Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Medium Hardness Rock
Family
Group
-
-
Other Categories
Medium Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock