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Class 9b: Coastal landforms and rivers

Class 9b: Coastal landforms and rivers. Ocean erosion. Coastal landforms from erosion. On newer, more rugged coastlines. Ocean transport. Longshore currents : waves not parallel to shore . Ocean deposition. Beaches!. Coastal deposition. On coastlines already worn down. Coastal deposition.

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Class 9b: Coastal landforms and rivers

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  1. Class 9b: Coastal landforms and rivers

  2. Ocean erosion

  3. Coastal landforms from erosion • On newer, more rugged coastlines

  4. Ocean transport • Longshore currents: waves not parallel to shore

  5. Ocean deposition • Beaches!

  6. Coastal deposition • On coastlines already worn down

  7. Coastal deposition

  8. Stabilizing the coast • Harbors or bays may close over, cliffs may fall

  9. Stabilizing the coast • Unintended consequences

  10. Coral reefs • The only organic landform

  11. Coral reefs

  12. Coral reefs • Absorb energy from waves and protect shores

  13. Fluvial basics • Fluvial processes: involving running water

  14. Fluvial basics • Watershed: all the land that drains into a stream

  15. Fluvial erosion • Amount of erosion depends on: • Speed of river • Degree of turbulence • Type of bedrock

  16. Fluvial transport • Material carried by a stream is the stream load • Bed load, dissolved load, or suspended load

  17. Fluvial deposition • Found all along rivers; especially at mouth

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