#Earth's_crust__crust  the outer layer of the Earth
  supertype:  layer  a relatively thin sheetlike expanse or region lying over or under another
  subtype:  horst  a ridge of the earth's crust that has been forced upward between two faults and so is higher than the surrounding land
  substance:  sial  sima
  part of:  lithosphere
  part:  asthenosphere  the lower layer of the crust

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