This photograph shows an iron formation. How does it 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

This photograph shows an iron formation. How does it 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

Quizplus · Accepted Answer

The Answer of This photograph shows an iron formation. How does it 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

This Photograph Shows an Iron Formation