Column A - Crossword Puzzle

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Across
  1. 1. a transverse earthquake wave that travels through the interior of the earth and is usually the second conspicuous wave to reach a seismograph.
  2. 3. The place inside Earth's crust where an earthquake originates.
  3. 4. A supercontinent that existed during the late Paleozoic and early Mesozoic eras.
  4. 6. Tectonics A scientific theory describing the large-scale motion of the plates making up the Earth's lithosphere since tectonic processes began on Earth between 3.3 and 3.5 billion years ago.
  5. 8. A sudden and violent shaking of the ground, sometimes causing great destruction, as a result of movements within the earth's crust or volcanic action.
  6. 11. A fault-bounded area or region with a distinctive stratigraphy, structure, and geological history.
  7. 13. The equilibrium that exists between parts of the earth's crust, which behaves as if it consists of blocks floating on the underlying mantle, rising if material is removed and sinking if material is deposited.
  8. 15. A bend in the rock strata.
  9. 16. The branch of geophysics concerned with the magnetism in rocks that was induced by the earth's magnetic field at the time of their formation.
  10. 18. Margin One of the three major zones of the ocean floor the other two being deep-ocean basins and mid-ocean ridges.
Down
  1. 1. The sideways and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate.
  2. 2. Drift The gradual movement of the continents across the earth's surface through geological time.
  3. 4. A longitudinal earthquake wave that travels through the interior of the earth and is usually the first conspicuous wave to be recorded by a seismograph.
  4. 5. The point on the earth's surface vertically above the hypocenter (or focus), point in the crust where a seismic rupture begins.
  5. 7. The superocean that surrounded the supercontinent Pangaea.
  6. 9. Mountain A mountain that often results from rifting, an indicator of extensional tectonics.
  7. 10. Mountain A mountain that is formed by the effects of folding on layers within the upper part of the Earth's crust.
  8. 12. Breaking apart or becoming separated through faulting caused by plate tectonics.
  9. 14. Cycle The quasi-periodic aggregation and dispersal of Earth's continental crust.
  10. 17. A fracture or zone of fractures between two blocks of rock.