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Nebula-planetesimal program thoughts (planetesimals…

- - - - paths for acqueous fluid flow
        
        fluids, gas, and ions can move to new areas
        
        fluid/gas/ions can flow to surface and are released #
    - - minerals broken
      - mineral reactions (dehydration)
      - new high P mineral formation
  - - - pressure fracturing
      - explosive decompression of planetesimal #
        
        gas released
        
        gas expulsion carries along partcles
- - - - chondrules hang out in nebula
      - chondrules acrete to planetesimals #
    - - aggregates hang out in nebula
      - aggregates break up
      - aggregates accrete to planetesimal #