Ballard Cliff is part of the Jurassic Coast

Jurassic Coast

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 ....

 near Swanage

Swanage

Swanage is a coastal town and civil parish in the south east of Dorset, England. It is situated at the eastern end of the Isle of Purbeck, approximately 10 km south of Poole and 40 km east of Dorchester. The parish has a population of 10,124 . Nearby are Ballard Down and Old Harry Rocks,...

 in the Isle of Purbeck

Isle of Purbeck

The Isle of Purbeck, not a true island but a peninsula, is in the county of Dorset, England. It is bordered by 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...

 in Dorset

Dorset

Dorset , is a county in South West England on the English Channel coast. The county town is Dorchester which is situated in the south. The Hampshire towns of Bournemouth and Christchurch joined the county with the reorganisation of local government in 1974...

, England.
The steeply dipping Cretaceous chalk that marks the northern end of Swanage Bay takes over from the Wealden beds at this location. A series of landslides during the late 1990s and early 2000s created a prominent white 'zig-zag' in the scarp. A rotational slip in the Chalk, Upper Greensand and Gault has developed, exposing a section of the soft, blue-grey Gault clay at the base of the cliff.

External links

• Ian West's Geology of the Wessex Coast Field Guide, including photographs