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Carbonate Calcium Formed When  Hydrogen Ions Contact Rock

Coal formation involves peat being compressed under sediments, with heat and pressure removing impurities and moisture, chemically transforming the remaining high-carbon material into coal.

Coal forms when peat is compressed under sediments; heat and pressure expel impurities and moisture, leaving a material with high carbon concentration that chemically transforms into coal.

Front Calcium carbonate is formed when 
Back hydrogen carbonate ions come into contact with rock and sediments on the ocean floor and acquire metal ions 

Tags: 4_3_carbon_cycling

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