Presentation on theme: "What features are distinctive? We surveyed 28 local people and asked them which of the landforms we were visiting were the most distinctive. We asked locals."— Presentation transcript:
What features are distinctive? We surveyed 28 local people and asked them which of the landforms we were visiting were the most distinctive. We asked locals as they would know all of them and not just pick the one that they were visiting. Feature%Why? Swanage Bay725looks tropical, relaxing, more arcades/shops, sharks in sea Studland Bay311better, no defences in the way of walking, dog friendly Peveril Point13.6unusual Old Harry518Impressive, no where else like it Durdle Door621iconic, easily recognisable, looks nice, weird shape Lulworth Cove414Pretty Other27.1Railway station 28100Stone globe at Durlston What are the results? Which are most popular? Which are least popular? Why? Are they concordant or discordant?
What effect is geology having? The geology is made up of layers (beds) of rock. Some like the chalk, Peveril and Purbeck Limestone are hard or more resistant. These erode more slowly Others like the Wheldon Beds and greensand and the clay are soft or less resistant. These erode more quickly. Along the south coast they have formed a concordant coastline, forming features like Lulworth Cove and Stair Hole Along the east coast they have formed a discordant coast creating features like the bays and headlands around Swanage. As well as the map, we also have the photo of the 5 rocks, the field sketch showing the resistant Purbeck Beds forming the narrow wall to the sea and the annotated photo of Swanage Bay showing the soft clay and the hard chalk
Field sketch of Stair hole Annotated photo of Swanage Bay and the Headland
How is longshore drift affecting the landforms? You are trying to establish whether LSD is creating or changing the distinctive landforms. Along the south coast (the concordant), there is no LSD however along the east there is. You can prove this in lots of ways 1.You have photos of the material being higher on one side than the other 2.You have google maps showing more sand on one side than the other 3.You have the graph you created while we were there which should show the pattern quite clearly.
What effect are coastal defences having? Where was being defended? Swanage – sea wall, groynes, beach renourishment (using sand from Poole Harbour) Studland – dune stabilisation, rock armour in the south and gabions, the base of Peveril Point Why? Why isn’t Lulworth being defended?
What impact is geomorphology having? This means slumping. Where did we see slumps? The unprotected part of Swanage (north) Greensand and Wealden Beds South of Studland – London Clay Man O War Bay – Chalk but very hihg!!