Definition
Banded iron formation are distinctive units of sedimentary rock that are almost always of Precambrian age
Jasperoid is a rare, peculiar type of metasomatic alteration of rocks
History
Origin
Western Australia, Minnesota
USA
Discoverer
Johann Gottlob Lehmann
Unknown
Etymology
From its formation process
From silica, the main mineral content of Jasperoid
Class
Sedimentary Rocks
Sedimentary Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Medium Hardness Rock
Family
Group
-
-
Other Categories
Coarse Grained Rock, Opaque Rock
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock