The areas where the soft rock has eroded away, next to the headland, are called bays. Coastlines where the geology alternates between bands of hard and soft rock which are perpendicular to the shore are called discordant coastlines. How are geomorphic processes creating coastal landforms? A map of the coastline showing the different layers of rock found at Lulworth and Durdle door cortesy of The Lulworth Estate. Discordant coastline occurs where bands of differing rock type run perpendicular to the coast. Erosion by waves opened up a crack in the headland, which then became a cave and eventually an arch. The landscape around the cove is constantly changing — it continues to evolve behind a narrow Portland Stone entrance whilst the softer chalk exposures are eroded.
Chesil Beach is an example of a bar. At the back of the cove is a band of more resistant chalk, so erosion is slower here. Durdle Door Fact file: The outer hard rock is Portland limestone. Sometimes the outer hard rock is punctured allowing the sea to erode the softer rocks behind. Lulworth Cove is situated on the south coast of England, on a concordant coastline. A concordant coastline occurs where the bands of differing rock types run parallel to the coast.
Part of the Dorset coastline in the UK running north from the Portland limestone of Durlston Head is a geogrsphy example of a discordant coastline. They reflect waves back out to sea preventing erosion of the cliff. Because there’s no erosion, there is no material to replenish the beach meaning the beach level will become lower. Typhoon Haiyan Case Levle.
There is also a risk for people from landslides and rockfalls. Chemical weathering and erosion are gradually wearing down these down.
Sign up Log in. It is called the Jurassic Coast as it has lots of fossils dating back lulworyh the Jurassic period. The site is self-funded and your support is really appreciated. Groynes are wooden or stone barries which are built at right angles to the coast.
How do climate and geolgy influence geomorphic processes? 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.
Take a look at our new resources in the shop Dismiss.
Coastal landforms – Edexcel – Revision 3 – GCSE Geography – BBC Bitesize
Chesil Beach is an example of a bar. At the back of the cove is a band of more resistant chalk, so erosion is slower here. Longshore drift affects the bay carrying material mainly gravel from the south to the north of the beach. Sediment has been deposited over time to form a spit. Then the cove widens where the softer clays have been more easily eroded.
The limestone cliffs forming the back wall of the cove are vulnerable to mass movement and sometimes experience small slides and slumps.
Lulworth Cove Coursework
If you’ve found the resources on this site useful please consider making a secure donation via PayPal to support the development of the site. Behind the spit there is The Fleet, a lagoon. The structures of rock run parallel to the coastline.
Coastal management strategies are being used along the Stuey coastline to prevent erosion in some areas but they have impacted the landscape and caused changes to the natural environment. The area around Swanage is made up of bands of hard and soft rock.
The headland juts out into the sea, so it is more vulnerable to high-energy waves.
A chalk cliff face is at the back of the cove. The spit has continued to join to the Isle of Portland. The areas where the soft rock has eroded away, next to the headland, are called bays.
The entrance is a breach in the very resistant Portland Stone that about metres wide. 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 creating a wider beach.
Dorset – case study of a UK coastal landscape
The sea has broken through this barrier and easily eroded the clays behind it. The rising sea flooded the valley and further eroded the cliffs to form the cove.
North of Swanage, the chalk outcrop creates the headland which includes Old Harry Rocks. They now lie with the oldest rock, the Portland Stone, casee the sea and the youngest stone, chalk, furthest inland. Coastlines where the geology alternates between bands of hard and soft rock which are perpendicular to the shore are called discordant coastlines.
Lulworth Cove is situated on the south coast of England, on a concordant coastline.