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Linnaemya vulpina
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Essex Field Club
Essex Field Club
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EFC Centre at Wat Tyler Country ParkWe are normally open to the public at our centre at Wat Tyler Country Park every Saturday, Sunday and bank holiday 11am-4pm. We are also open on Wednesdays 10am-4pm.
Summer recording Record Goats-rue Record Wild Carrot
Record Spear Thistle
Record comb-footed spider
Record Wasp Spider
Record Garden Spider Record Nigma walckenaeri spider

Geology Site Account


Beaumont Hill Sarsen Stone, GREAT DUNMOW, Uttlesford District, TL62672278, Potential Local Geological Site

 
 
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Site name: Beaumont Hill Sarsen Stone, Great Dunmow

Grid reference: TL 6267 2278

Brief description of site:

A large sarsen stone 1.6 metres (5'6") long sits in the grass on Beaumont Hill almost opposite the junction with Lime Tree Hill.

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Details

Sarsens are extremely hard boulders of sandstone formed around 55 million years ago when the climate of Britain was hot and a layer of sand beneath the surface of the ground became cemented with quartz. They are thus very resistant to erosion and have survived the rigours of the Ice Age. They originated on the chalk downland north and west of Essex and were carried here by rivers and glaciers. After retreat of the ice they became concentrated in river valleys.

The formation of silcretes (which includes sarsens and puddingstones) has been the subject of recent scientific debate. Research has compared the conditions under which sarsens and puddingstones may have been formed with the present day climate in the Kalahari Desert and parts of Australia.

 

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Reference: Salter 1914, Lucy 2003a

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