Large Scale Geology: Plate Tectonics

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Across
  1. 3. Rigid layer of Earth made of the crust and a part of the upper mantle
  2. 7. Break in rock caused by shear forces, where rocks move past each other without much vertical movement
  3. 10. Break in rock caused by tension forces, where rock above the fault surface moves down relative to the rock below the fault surface
  4. 12. Current in Earth’s mantle that transfers heat in Earth’s interior and is the driving force for plate tectonics
  5. 13. A large section of Earth’s oceanic or continental crust and rigid upper mantle that moves around on the asthenosphere
  6. 14. Vibrations produced when rocks break along a fault
Down
  1. 1. Large, ancient landmass that was composed of all the continents joined together
  2. 2. Theory that Earth’s crust and upper mantle are broken into plates that float and move around on a plasticlike layer of the mantle
  3. 4. Wave generated by an earthquake
  4. 5. Surface along which rocks move when they pass their elastic limit and break
  5. 6. Hess’s theory that new seafloor is formed when magma is forced upward toward the surface at a mid-ocean ridge
  6. 8. Wegener’s hypothesis that all continents were once connected in a single large landmass that broke apart and drifted slowly to their current positions
  7. 9. Break in rock caused by compressive forces, where rock above the fault surface moves upward relative to the rock below the fault surface
  8. 11. Plasticlike layer of Earth on which the lithospheric plates float and move around