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