Landforms of coastal erosion

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  • Created by: Roseanna
  • Created on: 30-03-10 15:05

Marine Erosional Process

Define the term; Marine erosional process

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Marine Erosional Process

Where wave action on coasts causes three types of erosion; hydraulic action, abrasion and corrosion.

These processes are most important when there are high enery waves such as storm waves (associated with storm conditions) strike the coasts which are made up of incoherent rock (easily eroded)

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Marine Erosional Process

Describe Hydraulic Action

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Marine Erosional Process

Wave compresses air in cracks in the rock face, pressure increases and when wave retreates, pressure explodes forcefully out of crack/joint causing it to weaken. This can lead to collapses of rock (erosion)

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Marine Erosional Process

Describe the process of Abrasion

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Marine Erosional Process

High energy waves pick up pebbles and shingle from sea bead and this sediment erodes the base of the cliff- the result is a wave cut notch and the cliff is undermined and retreats through rockfall

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Marine Erosional Process

Describe the process of Corrosion

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Marine Erosional Process

Some rock can be susceptible to solution. For example Calcoreaos rock (lime) may be attacked by solution which leads to rock disintergration

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