Sedimentary rocks made up of alternating thin layers of chert and iron minerals, mostly the iron oxides such as hematite and magnetite, are called ____.

Name: Sedimentary rocks made up of alternating thin layers of chert and iron minerals, mostly the iron oxides such as hematite and magnetite, are called ____.
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Sedimentary rocks made up of alternating thin layers of chert and iron minerals, mostly the iron oxides such as hematite and magnetite, are called banded iron formations (BIFs).

Sedimentary Rocks Made Up of Alternating Thin Layers of Chert