How do iron-ore deposits form?
A) as iron-rich layers, called iron formations, in sedimentary sequences
B) within granite or sandstone
C) the mixing of different types of groundwater
D) groundwater that encounters ancient buried hills
E) all of these

Question

Quizplus · Accepted Answer

Iron-ore deposits form as iron-rich layers, called iron formations, in sedimentary sequences. This process involves the accumulation of iron minerals within the layers of the Earth's crust over millions of years, often through the action of ancient oceans, lakes, and rivers.

How Do Iron-Ore Deposits Form