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 |
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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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