They now lie with the oldest rock, the Portland Stone, nearest the sea and the youngest stone, chalk, furthest inland. Lulworth Cove has occurred on a concordant coastline. The bedrock around Lulworth cove is sedimentary. 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. The outer hard rock is Portland limestone. The differing resistance to erosion leads to the formation of headlands and bays. This creates a cove which is a circular area of water with a relatively narrow entrance way from the sea.
In the winter , sand and shingle were dredged from the sea bed at Poole Harbour and added to the upper parts of Swanage beach creating a wider beach. As areas of the Dorset coast are being eroded, properities and infrastructure are at risk. Folding at Lulworth Cove. The differing resistance to erosion leads to the formation of headlands and bays. The alternating bands of hard and soft rock run parallel to the coast. Groynes Groynes are wooden or stone barries which are built at right angles to the coast. The harder Portland Beds form the layer that is the closest to the sea as show in the diagram above.
Because there’s no kulworth, there is no material to replenish the beach meaning the beach level will become lower. The area is extremely important for its geology, with some of the finest folding strata in Europe” BBC, Each year more than Coastlines where the geology alternates between bands of hard and soft rock which are perpendicular to the shore are called discordant coastlines.
The area inside the cove is very sheltered and tsudy from waves that break along the shore of the rest of the coastline.
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. Lulworth Cove is a bay located next to the village of Lulworth.
Dorset – case study of a UK coastal landscape
Part of the Dorset coastline in the UK running north from the Portland limestone of Durlston Head is a clear example of a discordant coastline. Dorsert is located on the southern coast of the UK. Then the cove widens where the softer lulwoeth have been more easily eroded.
A concordant coastline occurs where the bands of differing rock types run parallel to the coast. Please Support Internet Geography 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.
The entrance to the cove is narrow where the waves have cut through weaknesses in the resistant limestone. Durdle Door Fact file: This creates a cove which is a circular area of water with stury relatively narrow entrance way from the sea.
Lulworth cove – Example case – Revision Notes in GCSE Geography
The areas where the soft rock has eroded away, next to the headland, are called bays. New timber groynes were installed on Swanage beach in and have reduced the loss of beach material. Lulworth Cove has occurred on a concordant coastline.
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How is human activity, including mangement, working in combination with geomorphic processes kulworth shape the landscape? They trap material being transported by longshore drift to create larger beaches which can then absorb wave energy to reduce erosion rates.
The structures of rock run parallel to the coastline.
Dorset is located in the south of England. A map of the coastline showing the different layers of rock found at Lulworth and Durdle door cortesy of The Lulworth Estate. Erosion by waves opened up a crack in the headland, which then became a cave and eventually an arch. Take a look at our new resources in the shop Dismiss. Groynes Groynes are wooden or stone barries which are built at right angles to the coast.
Home Coastal Processes Fact file: The rocks at Lulworth we lifted, twisted and and folded into their current position. Hurricane Katrina Case Study. The arch is gradually being worn away by mechanical, chemical and biological weathering.
This area of the Jurassic coastline provides a habitat for a diverse range of natural life, particularly butterflies.