Chesil Beach is an example of a bar. Sediment has been deposited over time to form a spit. Its coastline has examples of many erosional and depositional landforms. Biological weathering caused by the vegetation on the top of the headland is also breaking up the rock. The soft rock is made of clay and sands, and the hard rock is chalk and limestone. The entrance to the cove is narrow where the waves have cut through weaknesses in the resistant limestone. Concrete sea walls are in place along most of Swanage beach.
The Foreland, Old Harry and his Wife: At the back of the cove is a band of more resistant chalk, so erosion is slower here. They reflect waves back out to sea preventing erosion of the cliff. The limestone cliffs forming the back wall of the cove are vulnerable to mass movement and sometimes experience small slides and slumps. However, this creates a strong backwash which removes sediment from the beach and can lead to erosion under the wall. The arch is gradually being worn away by mechanical, chemical and biological weathering.
Coastal landforms – AQA – Revision 3 – GCSE Geography – BBC Bitesize
It connects the Isle of Portland to the mainland. It is called the Jurassic Coast as it has lots of fossils dating back to the Jurassic period. As areas of the Dorset coast are being eroded, properities and infrastructure are at risk. The headland juts out into the sea, so it is more vulnerable to high-energy waves. Groynes Groynes are wooden or ssanage barries which are built at right angles to the coast. How do climate and geolgy influence geomorphic processes?
Dorset – case study of a UK coastal landscape
But, by stopping the movement of beach material along the coast beaches further down the coast are becoming narrower and subject to more erosion due to reduced ability to absorb wave energy. It is unusual as it has formed parallel to the coastline.
Dorsert is located on the southern coast of the UK. Chesil Beach is an example of a bar.
Groynes are wooden or stone barries which are built at right angles to the coast. Erosion is the dominant process in the bay with the beach losing material year on year. Concrete sea swanagee are in place along most of Swanage beach. The spit has continued to join to the Isle of Portland.
This is made of chalk which is a harder rock. Coastal management strategies are being used along the Dorset coastline to prevent erosion in some areas but they caxe impacted the landscape and caused changes to the natural environment.
Sea wall Concrete sea walls are in place along most of Swanage beach.
Beach replenishment In the wintersand and shingle were dredged from the sea bed at Poole Harbour and added to the upper parts of Swanage beach cawe a wider beach. Its coastline has examples of many erosional and depositional landforms. Sediment has been deposited over time to form a spit. How are geomorphic processes creating coastal landforms? Longshore drift affects the bay carrying material mainly gravel from the south to the north of the beach.
Dorset is located in the south of England. It has been created by longshore drift. Behind the spit there is The Fleet, a lagoon. They trap material being transported by longshore drift to create larger beaches which can then absorb wave energy to reduce erosion rates.
Behind the limestone is a layer of clay which is softer so more easily eroded. This caused the formation of Old Harry, a stack. The areas swanqge the soft rock has eroded away, next to the headland, are called bays. Elsewhere, the cliffs are not covered by vegetation, so wet weather weakens them causing slumps.
The bands of soft rock erode more quickly than those of the more resistant hard rock leaving a section of land jutting out into the sea, called a headland. There is also a risk for people from landslides and rockfalls. The entrance to the cove is narrow studg the waves have cut through weaknesses in the resistant limestone.
The area around Swanage is made up of bands of hard and soft rock.
Coastal Case Studies
At the back of the cove is a band of more resistant chalk, so erosion is slower here. Towards the northern end of the bay the cliffs are covered in vegetation, stablising them and protecting ssanage from erosion. Then the cove widens where the softer clays have been more easily eroded.