The iron in banded iron formations was primarily in which iron-bearing minerals?

Question

Quizplus · Accepted Answer

Banded iron formations (BIFs) are layers of sedimentary rocks that contain alternating layers of iron minerals and silica. The iron in BIFs is primarily in the form of iron oxides such as hematite and magnetite, which were deposited due to the precipitation of dissolved iron in the ancient oceans. Other iron-bearing minerals such as iron sulfide, silicate, and carbonate are not commonly found in BIFs.

The Iron in Banded Iron Formations Was Primarily in Which