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East Prawle

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Introduction

Day one: East Prawle - Start Point On day one, we analysed the areas of East Prawle to Start Bay, and noted key evidence that shows how geomorphic processes are able to shape a natural landscape over time. Such as weathering, erosion, transportation and deposition. Through doing this we could get a better understanding of how and why the coastal area between these two points had drastically changed so much, and could therefore answer the question "How had the physical landscape developed along the coastline between Prawle Point and Start Bay". Through noting the key processes that were continuously shaping the landscape it could even help us understand how some of the sites we saw, such as Gammon Head and Langerstone Point may look in the future. Here is a map of the south-east of England, which is highlighting the route from Prawle Point (green) to Start Point (red). Before we started analyzing the geomorphic processes which are currently shaping the landscapes we viewed, we would first need to note how the waves which help determine the formation of certain landscapes through the process of erosion, are actually formed. Definition of "fetch" Fetch, is the geographic term for the length of water due to the strength of prevailing winds. ...read more.

Middle

This meant that the worn down bays and the remaining headlands still stand today and can be easily noticed when visiting Gammon Head. Gammon Head processes Now we know how the headlands and bays on Gammon Head have been formed due to erosion we will need to know how other processes such as weathering currently affect the landscape. Here is a simple sketch of the current weathering processes which act on Gammon Head. Gammon Head - Present Day Future of Gammon Head Through knowing how the present day appearance of Gammon Head has been formed, such as its headlands and bays, and the other weathering processes which currently are acting on it, we can get a better understanding of how Gammon Head may look like in the future, with these various processes determining what it will look like. Here is a simple sketch of how Gammon Head may look like in the future. Langerstone Point From Gammon Head we walked to Langerstone Point. Langerstone Point was a n excellent present day example showing how a wave cut platform can eventually be formed due to changes in sea levels over many years. Here is a diagram of Langerstone Point present day. ...read more.

Conclusion

Slapton Sands - Longshore Drift Longshore drift is the movement of eroded material, in a shark fin shape way, along the coast line. The effect of this is determined by factors such as the direction and fetch of the present wind and, in the long term, of the prevailing wind. Waves striking the shore at an angle as opposed to straight on will cause the wave swash to move up the beach at an angle. The swash moves the sediment particles (typically sand or shingle) up the beach at this angle, while the backwash brings them, solely under the influence of gravity, directly down the beach. This has the net effect of gradual movement of the particles along the shore by the use of swash and backwash. In the past sea levels were generally much higher then they are nowadays. During the last ice age, the sea retreated back, revealing a seabed, which is still clearly visible today. Various types of rocks can be found on the beach of Slapton Sands that were once 40km out in Start Bay at the end of the last ice age. When the last ice age ended, the sea levels rose, which meant that various rocks were pushed back to the land. This is where they were eventually deposited, and therefore creating a barrier breach. ...read more.

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