WAVE EROSION

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WAVE EROSION
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How do waves form?

• By wind that blows across the waters surface.
• The wind causes water particles to move up and
  down as a wave goes by. The water particles
  themselves dont move forward.
• Think of it as wind blowing tall grass in the
  field. The grass moves back and forth but
  doesnt move from its place.

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Erosion by Wave

• Waves erode the land by impact and abrasion.
• Large waves hit the rocks along the shore causing
  them t to break apart.
• In shallow water, it picks up sediments and then
  when the wave hits the land it causes the
  sediments to wear away rock like sandpaper.

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Landforms created by Wave Erosion

• Many features can be formed from waves as they
  hit up against a rocky coast.
• It starts wearing away and form many different
  types of features
• Examples
• Sea caves
• Cliffs
• Sea stacks
• Sea Arches
• Pillars

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SEA CUT CLIFF
SEA ARCH
SEA CAVE
SEA CAVE
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SEA STACK OR PILLARS
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Deposits by Waves

• Waves shape the coast through both erosion and
  deposition.
• Deposition occurs when waves slow down and the
  water drops its sediments.
• Features formed from wave deposition
• Beaches
• Longshore drift
• Spit

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Deposition Formations

• A beach is an area of wave washed sediments along
  a coast.
• A longshore drift the sediments moves down the
  beach with the current.
• A spit is a beach that projects like a finger out
  into the water.

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Beach
Longshore Drift
Spit