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VOLCANOES (PARTS (CRATER (upper part , magma exits through), CENTRAL VENT…

- - - - lapilli
        
        2-64mm
      - blocks and bombs
        
        +64mm
      - ash
        
        -2mm
- - - - reduce number of explotions
    - - forms volcanic lava flows
    - - lava high temperature
        
        few explosions
  - - - icrease the pressure
      - cause explosions
    - - form pyroclastic flows
    - - hardens and obstructs the vents
    - - 2- vulcanian
      - 3- stombolian
      - 1- plinian
- - - - 1000 degrees
  - - - increassing presure
        
        magma cause walls
      - escaping gases
        
        cause other components
        
        is expelled