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composed of sand, coastal erosion creates little problem for the beach because it uses this sand to Chapter 9 Beach Erosion and Loss 3 sustain the environment. After all, sand is the lifeblood of beaches. However, migrating upward and landward through space and time does create a huge problem for buildings and roads built too close to the shoreline. And therein lies the rub â protecting the land with a seawall will lead to beach loss.
Water causes much erosion. When it falls as acid rain, it can dissolve rocks that are sensitive to acid. Marble & limestone weather when exposed to the rain. LEACHING by ground water: water soaks into the soil, picks up chemicals. This allows the water to leach or dissolve rocks it comes in contact with at bedrock. WAVE ACTION at the beach: the waves tumble rocks. The action of waves on a beach causes much erosion. The waves pound on the rocks & over time, cliffs crumble.