#Earth's_surface__surface  the outermost level of the land or sea; "earthquakes originate far below the surface"; "three quarters of the Earth's surface is covered by water"
  supertype:  #layer  a relatively thin sheetlike expanse or region lying over or under another
  part:  #body_of_water  #opening.space
  part of:  #lithosphere
  subtype:  #floor.Earth's_surface  the bottom surface of any a cave or lake etc.

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