Shaping The Coastline Essay

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Discuss the relative importance of two or more processes responsible for shaping the coast (such as marine erosion, transportation; deposition and land-based sub-aerial weathering, mass movement and runoff). (15 marks) The coast has many processes, which overtime will shape and change what it looks like. They are all responsible for shaping the land, they are all important in one way or another. The coastline is always changing. Marine erosion is a process which has a massive effect on the coastline. With marine erosion it mainly shapes the cliffs that meet the ocean. This process occurs more dominantly with more resistant rock types. It will reshape and transform the coastline from what it used to look like. There is the main point of erosion which is corrasion, attrition, solution and hydraulic action. Corrasion is when waves carry debris (such as rocks, sand and pebbles). This is then hurled against the cliff face as the wave breaks on the cliff this will cause the cliff face to then crack and break off over a period of time. These fragments are then picked up by the wave and hurled against the cliff face; the process repeats itself with the new…show more content…
One of those is runoff, where a continuous layer of water runs down the cliff face, it will pick up particles of silt and clay as it flows downward. This is due to the lack of vegetation to anchor the soil down. Sub-aerial weathering happens dominantly with less resistant rock such as clay. This is being stopped with coastal defences, which stops the cycle of coastal erosion. The type of processes which shape the coastal landscape all links together in a cycle. The dominance of these processes is the type of rock which they affect. For marine erosion it is resistant rock, whereas sub-aerial weathering affects less resistant rock more dominantly. These processes can be interrupted by coastal defences, which will cause certain processes from
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