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Coastal Erosion and Deposition Landforms Durdledoor, Dorset
- Words:
- 509
- Submitted:
- Thu Sep 04 2003

... Coastal Erosion and Deposition Landforms Erosion Landform : Durdledoor, Dorset: Durdle Door is an arch which has formed parallel to the shoreline. It has formed due to the erosion of Wealden Beds (weak easily eroded clays) and Greensand (a relatively weak limestone) being quickly eroded either side of a section of more-resistant rock, forming the headland of Durdle Door. The resistant rock is made up of two adjoining sections of Portland Stone (highly resistant limestone) and Purbeck Beds (combination of shales, clays and limstones, varying in resistance). However, due to wave refraction the headland of Durdle Door has been particularly attacked by coastal erosion. This originally resulted in small geo's and caves which have grown in size to large arches (see picture below), which then collapse leaving stacks and eventually stumps. This process of erosion on the more resistant rock is much slower than that of the less resistant rocks either side, resulting














