geo.wikisort.org - Coast

Kimmeridge Ledges ( /ˈkɪmərɪdʒ/) is a set of Kimmeridge clay ledges stretching out in to the sea on the Isle of Purbeck, a peninsula on the English Channel coast in Dorset, England.They are located to the southeast of Kimmeridge Bay and south of the villages of Kimmeridge, on the Smedmore Estate.[1][2]

Kimmeridge Ledges
Kimmeridge Ledges, looking east
Kimmeridge Ledges Location within Dorset
OS grid reference	SY915781
Civil parish	Kimmeridge
District	Purbeck
Shire county	Dorset
Region	South West
Country	England
Sovereign state	United Kingdom
Post town	WAREHAM
Postcode district	BH20
Police	Dorset
Fire	Dorset and Wiltshire
Ambulance	South Western
UK Parliament	South Dorset
List of places UK England Dorset 50.603431°N 2.124007°W / 50.603431; -2.124007

Overview

The area is renowned for its fossils, with The Etches Collection in the village of Kimmeridge displaying fossils found locally by Steve Etches over a 30-year period, especially on the Kimmeridge Ledges when exposed at low tide.

The Kimmeridge Ledges form part of the Jurassic Coast, a World Heritage Site. The coast is also part of a Site of Special Scientific Interest, and the whole area is part of the Dorset Area of Outstanding Natural Beauty, with a rich sea life.[3] Kimmeridge is the type locality for Kimmeridge clay, the geological formation that covers most of the area. Within the clay are bands of bituminous shale.

St Alban's Head can be viewed to the southeast. Forming the cliffs above the Kimmeridge Ledges are (west to east) Hen Cliff, Cuddle, Clavell's Hard, and Rope Lake Head. To the north is Smedmore House and to the northeast is imposing hill Swyre Head.

Geology

The geology of the area around Kimmeridge Ledges is important as part of the Jurassic Coast World Heritage Site.[4] It comprises bedrock formed in the Late Jurassic epoch, overlain in many places by superficial Quaternary head deposits.

Kimmeridge gives its name to the Kimmeridgian, the division of the Jurassic period in which the beds were laid down, because of the quality of the cliffs and the fossils they yield. Kimmeridge is also the type locality for the Jurassic age Kimmeridge Clay formation, which is well represented in southern England, and provides one of the source rocks for hydrocarbons found in the Wessex and North Sea Basins.

See also

• The Etches Collection
• List of Dorset beaches
• Geology of Dorset

References

Further reading

• Wignall P (ed.) (1995) Benthic Palaeoecology of the Late Jurassic Kimmeridge Clay of England (Special Papers in Palaeontology series), Palaeontological Association, 74pp, ISBN 0-901702-42-0.

---