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This Photograph Shows an Iron Formation

Question 15

Multiple Choice

This photograph shows an iron formation. How does it form? 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


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

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