Explain why geology affects the rate of coastal erosion.

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Below are some bullet points describing some of the many influences of geology on coastal erosion.

Explanation:

Harder more erosion-resistant rocks will slow the rate of erosion while weaker and more erodible rocks facing the sea will speed up the rate of erosion. Erosion is greater on those continental margins along subduction zones and tectonic plate borders because the continental shelf is almost non-existent. Erosion is lesser on coasts located in the middle of tectonic plates because of the presence of an extensive continental shelf with reduces wave height and lowers the erosion rate. The presence of loose material and debris on beaches can create an important obstacle to wave action that minimizes and dramatically slows erosion of a beach or coast.

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