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What are the two main factors that affect how quickly a coastline erodes?

User Yashima
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2 Answers

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hardness of the rock and wave energy 
User BugsForBreakfast
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Weathering and Deposition I believe. Weathering is breaking up the rocks into smaller pieces and deposition is the placing of the sediments.

For extra, erosion is the transportation of the sediments

They all work together

User Antonin Hildebrand
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