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COASTS

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Across
  1. 3. A glacial valley which has been flooded by the sea (5)
  2. 4. A type of weathering caused by acid rain and salt spray (9)
  3. 6. Beach sediment larger than sand but smaller than pebbles (7)
  4. 7. A piece of land sticking out to sea (8)
  5. 8. The forward movement of sediment on a beach caused by a breaking wave (5)
  6. 10. A small and often circular bay (4)
  7. 11. The seaward movement of sediment on a beach as a wave retreats (8)
  8. 13. A form of concrete sea defence often with a curved profile (3,4)
  9. 15. The erosional force of waves pounding against fissures in a rock face (9,6)
  10. 19. A tidal wave often caused by earthquakes (7)
  11. 20. A place where two caves on either side of a headland join together (4)
  12. 24. An extension of a beach where a coast changes direction (4)
  13. 26. A drowned river mouth (3)
  14. 27. The very deep part of an ocean corresponding with a subduction zone (5,6)
  15. 28. An indentation in a cliff caused by erosion of a weak point (4)
  16. 29. An isolated mass of rock offshore - like Old Harry (5)
Down
  1. 1. A man-made obstruction stretching out to sea to prevent beach erosion (6)
  2. 2. The movement of sand and shingle along a beach (9,5)
  3. 5. A wetland that is often found in estuaries (4,5)
  4. 9. A flat area created by marine erosion (4,3,8)
  5. 11. An indentation in a coastline (3)
  6. 12. A place where marine erosion is taking place (5)
  7. 14. A small sand hill behind a beach (4)
  8. 16. The act of piling more sand on an eroded beach (13)
  9. 17. A form of erosion involving impact of sediment against a cliff face (8)
  10. 18. The process which causes sediment to become smaller and rounder (9)
  11. 21. The tidal lower reaches of a river valley (7)
  12. 22. The distance over which the wind acts upon a water surface (5)
  13. 23. An accumulation of sand, shingle or pebbles at a sheltered part of the coast (5)
  14. 25. Changes in local sea level caused by gravitational pull of the moon (4)