EC3 - GeologicalCarbonCycle...

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Geological Carbon Cycle In the atmosphere,  carbonic acid  forms by a reaction with  atmospheric carbon dioxide (CO 2 ) and water.  reacts with minerals at the earth’s surface, slowly dissolving them  into their component  ions  through the process of chemical weathering.  ions are carried in surface waters like streams and rivers  eventually to the ocean, where they  precipitate  out as minerals like  calcite (CaCO 3 ).  Through continued deposition and burial, this calcite  sediment   forms the rock called  limestone . seafloor spreading      pushes the seafloor under continental margins  in the process of  subduction As seafloor carbon is pushed deeper into the earth by tectonic  forces , it  heats  up, eventually melts, and can rise back up to the surface,  where it is released as CO 2  and returned to the atmosphere.  Biological carbon cycle:
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EC3 - GeologicalCarbonCycle...

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