How does iron formation form?
A) evaporation of water in a lake or sea
B) accumulation of microscopic organisms composed of calcium carbonate
C) precipitation from seawater early in Earth's history
D) accumulation of silica-rich organisms or mixing of seawater and groundwater

Question

Quizplus · Accepted Answer

Iron formations are primarily the result of chemical precipitation from ancient seawater, particularly during the Precambrian era. This process involved the oxidation of iron within the seawater, leading to the deposition of iron-rich layers on the ocean floor.

How Does Iron Formation Form