Rocks With The Shrock

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Across
  1. 3. theory explaining the structure of the earth's crust and many associated phenomena as resulting from the interaction of rigid lithospheric plates which move slowly over the underlying mantle.
  2. 4. type of tectonic plate boundary where two plates slide horizontally past each other, rather than colliding or separating
  3. 7. ductile, semi-fluid layer of Earth's upper mantle, located beneath the lithosphere
  4. 10. intrusive magma body transforms the surrounding cooler rock into a new
  5. 12. seismically active submarine ridge system situated in the middle of an ocean basin and marking the site of the upwelling of magma associated with seafloor spreading
  6. 14. undisturbed sequence of sedimentary rock layers, the oldest layers are at the bottom, and the youngest layers are at the top
  7. 15. the thicker, less dense layer of Earth's crust that forms the continents
  8. 16. geologic axiom stating that any geological feature, such as a fault, intrusion, or erosional surface, is younger than the rock layers or structures it cuts through
  9. 17. Earth's innermost, solid, high-pressure sphere, primarily composed of a iron-nickel alloy
  10. 18. break apart or become separated through faulting caused by plate tectonics
  11. 19. buried, irregular surface between rock layers that represents a significant break in geologic time
  12. 20. a tectonic plate boundary where two plates move away from each other, resulting in the creation of new crust as magma rises from the Earth's mantle to the surface and solidifies
Down
  1. 1. body of intrusive igneous rock formed when magma cools and crystallizes deep within the Earth's crust, below the surface
  2. 2. changes in the earth's crust during geological history have resulted from the action of continuous and uniform processes
  3. 5. 67
  4. 6. plate tectonic process by which Earth's continents repeatedly merge into a single supercontinent and then break apart again over hundreds of millions of years
  5. 8. formation of new areas of oceanic crust, which occurs through the upwelling of magma at midocean ridges and its subsequent outward movement on either side
  6. 9. type of tectonic plate boundary where two plates move toward each other and collide
  7. 11. used to determine the age of rocks, minerals, and fossils by measuring the decay
  8. 13. Earth's continents have moved slowly across the planet's surface