Coastal Erosion Flashcards

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Give an outline of what corrasion involves.
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Corrasion is when destructive waves pick up beach material (e.g. pebbles) and hurl them at the base of a cliff. Over time this can loosen cliff material forming a wave-cut notch.

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Give an outline of what corrasion involves.
What is attrition?
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Attrition is when waves cause rocks and pebbles to bump into each other and break up.

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What is attrition?
What is corrosion/solution?
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Corrosion/solution is when certain types of cliff erode as a result of weak acids in the sea.

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What is corrosion/solution?
Give an outline of the steps involved in hydraulic action.
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Waves hitting the base of a cliff causes leads to air compression in cracks, joints and folds in bedding planes, causing repeated changes in air pressure. As air rushes out of the crack when the wave retreats, it leads to an explosive effect as pressure is released. This process is supported further by the weakening effect of weathering. The material breaks off cliffs, sometimes in huge chunks. This process is known as hydraulic action.

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Give an outline of the steps involved in hydraulic action.
Give an outline of what abrasion involves.
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Abrasion occurs as breaking waves, concentrated between the high and low watermarks, which contain sand and larger fragments wear away the base of a cliff or headland. It is commonly known as the sandpaper effect. This process is particularly common in high-energy storm conditions.

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Give an outline of what abrasion involves.




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