It is unusual as it has formed parallel to the coastline. At the back of the cove is a band of more resistant chalk, so erosion is slower here. A concordant coastline has the same type of rock along its length. However, this creates a strong backwash which removes sediment from the beach and can lead to erosion under the wall. The headland is made out of chalk, a hard rock.
Erosion by waves opened up a crack in the headland, which then became a cave and eventually an arch. However, this creates a strong backwash which removes sediment from the beach and can lead to erosion under the wall. An arch at the end of the headland has collpased to form a stack called Old Harry and a stump called Old Harry’s Wife. The arch is gradually being worn away by mechanical, chemical and biological weathering. Over time Old Harry will collapse to form a stump. Then the cove widens where the softer clays have been more easily eroded.
Erosion is the dominant process in the bay with the beach losing material year on year.
An Examination of the coast line in the Swanage Area. – GCSE Geography – Marked by
A concordant coastline has the same type of rock along its length. It has been created by longshore drift. This is made of chalk which is a harder rock.
The arch is gradually being worn away by swznage, chemical and biological weathering. The area around Swanage is made up of bands of hard and soft rock.
Dorset – case study of a UK coastal landscape
New timber groynes were installed on Swanage beach in and have reduced the loss of beach material. Sediment has been deposited over time to form a spit.
Behind the spit there is The Fleet, a lagoon. The entrance to the cove is narrow sutdy the waves have cut through weaknesses in the resistant limestone.
Coastal landforms – AQA – Revision 3 – GCSE Geography – BBC Bitesize
Dorsert is located on the southern coast of the UK. They reflect waves back out to sea preventing erosion of the cliff. The soft rock is made of clay and sands, and the hard rock is chalk and limestone.
As areas of the Dorset coast are being eroded, properities and infrastructure are at risk. Over time Old Harry will collapse to form a stump. Because there’s no erosion, there is no material to replenish the beach meaning the beach level will become lower.
Chesil Beach is an example of a bar. 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.
The headland juts out into the sea, so it is more vulnerable to high-energy waves. The Foreland, Old Harry and swwnage Wife: The headland is made out of chalk, a hard rock.
Behind the limestone is a layer of clay which is softer swanagr more easily eroded.
Coastal Case Studies
How do climate and geolgy influence geomorphic processes? The spit has continued to join to the Isle of Portland.
Chemical weathering and erosion are gradually wearing down these down. This means waves are slowed, reducing erosion and will help to protect proprties and cliffs. It is unusual as it has formed parallel to the coastline. Towards the northern end of the bay the cliffs are covered in vegetation, stablising them and protecting them from erosion. Elsewhere, the cliffs are not covered by vegetation, so wet weather weakens them causing slumps.
How is human activity, including mangement, working in combination with geomorphic processes to shape the landscape?
The bands of soft rock erode more quickly than those of the more resistant hard rock leaving a section of gcss jutting out into the sea, called a headland. An arch at the end of the headland has collpased to form a stack called Old Harry and a stump called Old Harry’s Wife. Concrete sea gcsee are in place along most of Swanage beach. 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.
How are geomorphic processes creating coastal landforms?