Erosion, Plate Tectonics, and Geologic Time

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Across
  1. 3. the earlier of two divisions of the Precambrian era, during which the earliest forms of life are assumed to have appeared
  2. 4. a rather large interval of time that is meaningful in the life of a person, in history, etc
  3. 5. the Cenozoic Era or group of systems.
  4. 7. the Paleozoic Era or group of systems
  5. 8. the succession of eras, periods, and epochs as considered in historical geology
  6. 9. the various mechanical and chemical processes that cause exposed rock to decompose.
  7. 11. noting or pertaining to a period of the Mesozoic Era, from 140 million to 65 million years ago
  8. 14. removal from an office or position.
  9. 15. Drift the very gradual movement of continents across the Earth's surface as a result of the movement of the plates that they lie on
  10. 17. noting or pertaining to a period of the Mesozoic Epoch, occurring from 190 to 140 million years ago
Down
  1. 1. noting or pertaining to a period of the Mesozoic Era, occurring from 230 to 190 million years ago
  2. 2. To wear (something) away by or as if by abrasion
  3. 4. noting or pertaining to the latter half of the Precambrian Era, from about 2.5 billion to 570 million years ago
  4. 6. the process by which the surface of the earth is worn away by the action of water, glaciers, winds, waves, etc.
  5. 7. a theory of global tectonics in which the lithosphere is divided into a number of crustal plates
  6. 10. a crack on or below the Earth's surface
  7. 12. a period of time marked by distinctive character, events, etc
  8. 13. the Mesozoic Era or group of systems
  9. 15. the thick outer surface of the Earth or another planet
  10. 16. The process of wearing down or rubbing away by means of friction.