Most of the world's iron is mined from:
A) placer deposits.
B) marine evaporates.
C) banded iron formations.
D) disseminated ore deposits.

Question

Quizplus · Accepted Answer

Most of the world's iron is mined from banded iron formations, which are geological formations that are rich in iron oxides. These formations were formed during the Precambrian era, when the Earth's atmosphere lacked oxygen, and iron was abundant in the oceans. As a result, iron oxide precipitated out of the water and accumulated on the ocean floor, forming banded iron formations. Today, these formations are mined to extract the iron ore.

Most of the World's Iron Is Mined From