Kimmeridge


Kimmeridge

Kimmeridge is a small village in the Purbeck district of Dorset, England, situated on the English Channel coast. The village has a population of 110 (2001). [ [http://www1.dorsetcc.gov.uk/LIVING/FACTS/Census2001.nsf/6cadf4da179fc19500256663004afece/cbcf90d44565d05780256ec5004df803?OpenDocument Census data from 2001] ] Non-resident parking is managed by the nearby Smedmore Estate.

The village stands on Jurassic shale cliffs, and gives its name to 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. It is part of the Jurassic Coast World Heritage Site because of the quality and variety of geological landforms along the coast. There is a Jurassic Coast Visitor Centre at Kimmeridge.

The Bay is also the Type locality for the Jurassic age Kimmeridge Clay formation, that is well-represented in southern England, and provides one of the source rocks for hydrocarbons found in the Wessex and North Sea Basins.

Beneath the cliffs there is a large wave-cut platform (known as The Flats) and a rocky shore, with good quality rock pools and variety of rocky shore wildlife. Kimmeridge coast is usually warm, and perfect for studying seaweed and other organisms. The top, middle and lower beaches are not easily definable without markings, but these are relatively easy to place.

On the cliff toward the west is the BP "nodding donkey" oil pump which has been pumping continually since the late 1950s, making it the oldest working oil pump in the world. The well currently yields around 65 barrels per day [http://www.bpnsi.com/index.asp?id=7369643D312669643D313531 BP NSI - Wytch Farm terminal] ] from the Middle Jurassic strata that lie around 350 metres below the cliff. [ [http://www.english-nature.org.uk/special/geological/sites/area_ID9.asp Natural England - England's Geology - Dorset] ] The well has been operating for this long because it has tapped into a network of connected reserves, although the yield is decreasing year on year. The oil is transported by tanker to the main BP site at Wytch Farm.

Directly east of Kimmeridge bay (above Hen Cliff) is a folly known as Clavell Tower which inspired P.D. James's novel "The Black Tower". Because it was in danger of falling down the eroding cliff, the tower has been dismantled and reassembled a safe distance from the cliff edge.

Kimmeridge Bay is a surfer area. Although it breaks infrequently due to its lack of exposure to Atlantic swells when it is on it produces walls of water. Below the cliffs to the East is 'The Ledges', slow left and right hand breaking waves. To the West is 'Broad Bench', within the MOD firing range and only accessible at the rare times when the ranges are open to the public. This break can have right-handers which spiral for 70 yards or more into the bay.

ee also

* List of Dorset beaches
* Jurassic Coast

References


* James P D (1975) "The Black Tower", Sphere books (1987 edition), 288pp, ISBN 072-215110-1.
* Wignall P (ed) (1995) "Benthic Palaeoecology of the Late Jurassic Kimmeridge Clay of England" (Special Papers in Palaeontology series), Palaeontological Association, 74pp, ISBN 090-170242-0.
* [http://www.soton.ac.uk/~imw/kimerbay.htm Kimmeridge Bay; Geology of the Wessex Coast] by Ian West

External links

* [http://www.bp.com/genericarticle.do?categoryId=2012968&contentId=2001682 Wytch Farm] environmental award
* [http://www.purbeck.gov.uk/ Purbeck] District Council
* [http://www.kimmeridge.ukfossils.co.uk Fossil Collecting at Kimmeridge Bay]


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