The Jurassic Coast is a World Heritage Site on the English Channel coast of southern England. The site stretches from Orcombe Point near Exmouth in East Devon to Old Harry Rocks near Swanage in East Dorset, a distance of 153 kilometres (95 mi). Chartered in 2001, the Jurassic coast was the second wholly-natural World Heritage Site to be designated in the United Kingdom. Its entire length can be walked on the South West Coast Path.
The site contains a number of unique geological features and shows excellent examples of different landforms, including the natural arch at Durdle Door, the cove and limestone folding at Lulworth Cove and an island, the Isle of Portland.
Old Harry Rocks are chalk stacks located directly east of Studland and to the north of Swanage in Dorset. The rocks are part of the Jurassic Coast World Heritage Site of which they form the eastern end. It is also believed that the rocks were once connected to The Needles on the Isle of Wight.
The cliff is chalk, with some bands of flint, which have been gradually reduced over the centuries, some of the earlier stacks having fallen (old Harry's original wife fell in 1896), while new ones have been formed by the breaching of narrow isthmuses.
Durdle Door is a natural limestone arch on the Jurassic Coast near Lulworth in Dorset, England. The arch has formed on a concordant coastline where bands of rock run parallel to the shoreline. Here the rock strata are nearly vertical, and the bands of rock are quite narrow.
The 400-foot (120 m) isthmus which joins the limestone to the chalk is made of a 50-metre (160 ft) band of Portland limestone, which is less resistant than the Purbeck beds, a narrow and compressed band of Cretaceous clays—Wealden Clay, sands and chert beds—and then narrow bands of Greensand and sandstone.
Lulworth Cove is a cove near the village of West Lulworth, on the Jurassic Coast World Heritage Site. The cove has formed because there are bands of rock of alternating resistance running parallel to the shore (a concordant coastline). The entrance to the cove is a narrow gap in the limestone bands.