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Essex Field Club
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EFC Centre at Wat Tyler Country ParkWe are closed due to the Covid-19 situation, but we are otherwise normally open to the public at our centre at Wat Tyler Country Park every Saturday, Sunday and bank holiday 11am-4pm, check. We are also normally open on Wednesdays 10am-4pm.

Geology Site Account

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Ugley Green Puddingstone , UGLEY GREEN , Uttlesford District, TL52422712, Notified Local Geological Site

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Site category: Boulders - puddingstone

Site name: Ugley Green Puddingstone

Grid reference: TL 5242 2712

Brief description of site:

Beside the green, next to the village pump, is a fine boulder of Hertfordshire puddingstone 1.2 metres (4 feet) long. It was formerly situated on the village green.

Another boulder of Hertfordshire puddingstone (90cm x 40cm x 40cm in size) is situated just inside the yard of Foxton's Farm nearby (TL 5250 2725).


Hertfordshire Puddingstone was formed around 55 million years ago when the climate of Britain was hot and a layer of pebbles 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 in Hertfordshire, hence the name, and were probably carried to Essex by the River Thames when it flowed north of its present course. However, the distribution and abundance of Hertfordshire puddingstone in parts of Essex suggests that some occurrences may have a local Essex source.

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.

The puddingstone boulder at Ugley Green. Photo: G. Lucy


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Reference: Lucy 2003a

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