This photograph shows chalk. How is it formed? A.
Chapter , Problem 40MCQ(choose chapter or problem)
Problem 40MCQ
This photograph shows chalk. How is it formed?
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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