A discordant coastline occurs where bands of different rock types run perpendicular to the coast. [1]
The differing resistance to erosion leads to the formation of headlands and bays. A hard rock type such as granite is resistant to erosion and creates a promontory whilst a softer rock type such as the clays of Bagshot Beds is easily eroded creating a bay.
Part of the Dorset coastline running north from the Portland limestone of Durlston Head is a clear example of a discordant coastline. The Portland limestone is resistant to erosion; then to the north there is a bay at Swanage where the rock type is a softer greensand. North of Swanage, the chalk outcrop creates the headland which includes Old Harry Rocks.
The converse of a discordant coastline is a concordant coastline.
A natural arch, natural bridge, or rock arch is a natural landform where an arch has formed with an opening underneath. Natural arches commonly form where inland cliffs, coastal cliffs, fins or stacks are subject to erosion from the sea, rivers or weathering.
The Jurassic Coast is a World Heritage Site on the English Channel coast of southern England. It stretches from Exmouth in East Devon to Studland Bay in Dorset, a distance of about 96 miles (154 km), and was inscribed on the World Heritage List in mid-December 2001.
Studland is a village and civil parish on the Isle of Purbeck in Dorset, England. The village is located about 2 miles (3.2 km) north of the town of Swanage, over a steep chalk ridge, and 3 miles (4.8 km) south of the South East Dorset conurbation at Sandbanks, from which it is separated by Poole Harbour. The parish includes Brownsea Island within the harbour. In the 2011 census the parish had 182 households and a population of 425, though many of the houses in the village are holiday homes, second homes, or guest houses, and the village's population varies depending upon the season.
Lulworth Cove is a cove near the village of West Lulworth, on the Jurassic Coast in Dorset, southern England. The cove is one of the world's finest examples of such a landform, and is a World Heritage Site and tourist location with approximately 500,000 visitors every year, of whom about 30 per cent visit in July and August. It is close to the rock arch of Durdle Door and other Jurassic Coast sites.
Swanage is a coastal town and civil parish in the south east of Dorset, England. It is at the eastern end of the Isle of Purbeck and one of its two towns, approximately 6+1⁄4 miles (10 km) south of Poole and 25 miles (40 km) east of Dorchester. In the 2011 census the civil parish had a population of 9,601. Nearby are Ballard Down and Old Harry Rocks, with Studland Bay and Poole Harbour to the north. Within the parish are Durlston Bay and Durlston Country Park to the south of the town. The parish also includes the areas of Herston, just to the west of the town, and Durlston, just to the south.
The Isle of Purbeck is a peninsula in Dorset, England. It is bordered by water on three sides: the English Channel to the south and east, where steep cliffs fall to the sea; and by the marshy lands of the River Frome and Poole Harbour to the north. Its western boundary is less well defined, with some medieval sources placing it at Flower's Barrow above Worbarrow Bay. John Hutchins, author of The History and Antiquities of the County of Dorset, defined Purbeck's western boundary as the Luckford Lake steam, which runs south from the Frome. According to writer and broadcaster Ralph Wightman, Purbeck "is only an island if you accept the barren heaths between Arish Mell and Wareham as cutting off this corner of Dorset as effectively as the sea." The most southerly point is St Alban's Head.
In coastal geography, a concordant, longitudinal, or Pacific type coastline occurs where beds, or layers, of differing rock types are folded into ridges that run parallel to the coast. The outer hard rock provides a protective barrier to erosion of the softer rocks further inland. Sometimes the outer hard rock is punctured, allowing the sea to erode the softer rocks behind. This creates a cove, a circular area of water with a relatively narrow entrance from the sea.
Durdle Door is a natural limestone arch on the Jurassic Coast near Lulworth in Dorset, England. It is privately owned by the Weld Family who own the Lulworth Estate, but it is also open to the public.
Durlston Country Park is a 320-acre country park and nature reserve stretching along the coast of the Isle of Purbeck on the outskirts of Swanage in Dorset, England. The park is a popular destination for tourists to enjoy the walks, views, visitor centre, climbing, and wildlife, including Durlston Castle, the Great Globe, Tilly Whim Caves, and Anvil Point Lighthouse. It is a gateway to the Jurassic Coast World Heritage Site, forms part of the 630 mile South West Coast Path, and is owned by Dorset Council.
Dorset is a county in South West England on the English Channel coast. Covering an area of 2,653 square kilometres (1,024 sq mi); it borders Devon to the west, Somerset to the north-west, Wiltshire to the north-east, and Hampshire to the east. The great variation in its landscape owes much to the underlying geology, which includes an almost unbroken sequence of rocks from 200 to 40 million years ago (Mya) and superficial deposits from 2 Mya to the present. In general, the oldest rocks appear in the far west of the county, with the most recent (Eocene) in the far east. Jurassic rocks also underlie the Blackmore Vale and comprise much of the coastal cliff in the west and south of the county; although younger Cretaceous rocks crown some of the highpoints in the west, they are mainly to be found in the centre and east of the county.
The Purbeck Hills, also called the Purbeck Ridge or simply the Purbecks, are a ridge of chalk downs in Dorset, England. The ridge is formed by the structure known as the Purbeck Monocline, and extends from Lulworth Cove in the west to Old Harry Rocks in the east, where it meets the sea. The hills are part of a system of chalk downlands in southern England formed from the Chalk Group which also includes Salisbury Plain and the South Downs. For most of their length the chalk of the Purbeck Hills is protected from coastal erosion by a band of resistant Portland limestone. Where this band ends, at Durlston Head, the clay and chalk behind has been eroded, creating Poole Bay and the Solent. The ridge of steeply dipping chalk that forms the Purbeck Hills continues further east on the Isle of Wight.
Purbeck Marble is a fossiliferous limestone found in the Isle of Purbeck, a peninsula in south-east Dorset, England. It is a variety of Purbeck stone that has been quarried since at least Roman times as a decorative building stone.
Peveril Point is a headland on the east-facing coast of the Isle of Purbeck in Dorset, England, and is part of the town of Swanage. It forms the southern end of Swanage Bay. It is located at 50°36.43′N01°56.69′W OS Grid Ref: SZ 041 787.
A headland, also known as a head, is a coastal landform, a point of land usually high and often with a sheer drop, that extends into a body of water. It is a type of promontory. A headland of considerable size often is called a cape. Headlands are characterised by high, breaking waves, rocky shores, intense erosion, and steep sea cliff.
Cow Corner is the north-western end of Worbarrow Bay, a small secluded bay on the south coast of the Isle of Purbeck in Dorset, England.
Anvil Point is part of the Jurassic Coast on the Isle of Purbeck in Dorset, England. It is within the grounds of Durlston Country Park and is about 3 kilometres (1.9 mi) from Swanage town centre. Anvil Point Lighthouse is located on the point.
The Great Globe at Swanage is one of the largest stone spheres in the world and stands at Durlston Castle within Durlston Country Park, a 113-hectare (280-acre) country park and nature reserve. It is constructed of Portland stone, weighs about 40 tonnes and is 3 metres (10 ft) in diameter.
Durlston Castle stands within Durlston Country Park, a 1.13 square-kilometre (280-acre) country park and nature reserve stretching along the coastline south of Swanage, on the Isle of Purbeck in Dorset.
Flower’s Barrow is an Iron Age hillfort, built over 2500 years ago, above Worbarrow Bay in Dorset on the south coast of England.
Dorset is a county located in the middle of the south coast of England. It lies between the latitudes 50.512°N and 51.081°N and the longitudes 1.682°W and 2.958°W, and occupies an area of 2,653 km2. It spans 90 kilometres (56 mi) from east to west and 63 kilometres (39 mi) from north to south.