Plate tectonics and carbon cycle

Plate tectonics and carbon cycle

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  • Pangea breaks up into smaller continents 770 ma ago.
  • In subduction zones, the oceanic plate builds magma and pressure. 
  • Volcanos erupt, and carbon is released into the atmosphere during degassing. 
  • Moist air causes lots of rain, reducing carbon dioxide and causing cooling temperatures.  
  • Sun rays reflect off the white glacier ice and temperatures cool more.
  • Cold dry air stops glaciers forming and deserts form instead.  Without rain, carbon dioxide builds in the air, greenhouse effect occurs and temperatures rise.   
  • Carbon in the atmosphere combines with rain and makes carbonic acid, which erodes rocks and causes carbon sediment in oceans.  
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