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Essex Field Club
Essex Field Club
registered charity
no 1113963
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EFC Centre at Wat Tyler Country ParkIn January we are only open to the public at our centre at Wat Tyler Country Park on Wednesdays 10am-4pm.
Autumn recording Record Grey Squirrel Record Fly Agaric
Record Ivy Bee
Record Wild Teasel
Record Sloe, Blackthorn
Record Garden Spider Record Nigma walckenaeri spider

Geology Site Account

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Doggetts Pit, ROCHFORD, Rochford District, TQ87889147, General geological site

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Doggetts Pit provides the only exposures of Rochford Gravel. Rochford Gravel is an infilling of the Rochford Channel which is thought to have been cut by the Thames about 400,000 years ago (MIS 11) shortly after the diversion of the river by the Anglian ice sheet. The Rochford Channel is therefore an upstream equivalent of the famous Clacton Channel.

The well-bedded sandy gravel in Doggetts Pit is capped by a layer of brickearth or loam which has penetrated the underlying gravel in ice wedges, which were said to have been spaced at intervals of 10 to 15 metres along the old working face. Patterned ground with fossil ice-wedge polygons is present in the ad-jacent fields and can be seen on aerial photo-graphs. The site is now a popular fishing lake with sandy gravel exposed in the banks.

Alluvial loam, and 'brickearth' overlying Rochford Gravel seen in the disused pit at Doggetts in 1973. Photo © British Geological Survey (P211773).


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Reference: Bridgland 2001 (p.817,818), Lake 1986 (p.34 & 37)

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