Banded iron formation is one of the important type of rocks. If we have to define Banded iron formation in general, Banded iron formation are distinctive units of sedimentary rock that are almost always of Precambrian age. Banded iron formation comes under Sedimentary Rocks. All Sedimentary Rocks have similar properties and formation process. Along with Banded iron formation Definition, know more about the History of Banded iron formation, Etymology of Banded iron formation in next sections.