Plate Tectonics

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Across
  1. 2. and Nazco West of Central America.
  2. 3. the action or process in plate tectonics.
  3. 5. the hard outer covering.
  4. 6. molten rock material within the earth.
Down
  1. 1. moving or extending in different direction.
  2. 2. tending to move toward one point.
  3. 4. something that indicates or fixes a limit or extent.