CARBON - geological processes and origins

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  • Geological processes and origins of carbon
    • Origin
      • The formation of sedimentary carbonate rocks (limestone) in oceans.
        • The himalayas - mountains started life as ocean sediments rich in CaCO3 from crustaceans, plankton and corals. the sediments upfolded, the carbon has been weathered, eroded and transported back to oceans.
      • The himalayas - mountains started life as ocean sediments rich in CaCO3 from crustaceans, plankton and corals. the sediments upfolded, the carbon has been weathered, eroded and transported back to oceans.
      • Carbon derived from animals and plants are found in shale and coal. made up from 300mil years of dead organisms. the remains sunk to the bottom of oceans and decayed under silt and sand.
        • Burning these as fossil fuels releases all the carbon they contained.
    • Process releasing carbon
      • people burning fossil fuels (unnatural).
      • Carbon dioxide reacts with moisture to form carbonic acid, which can dissolve surface minerals. (chemical weathering).
      • pockets of carbon in the earths crust are released through mid-ocean ridges, hotspots and subduction zones (OUT-GASSING) whereby volcanic eruptions and earthquakes disrupt them.

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