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Cirrhia gilvago
find out more... Dusky-lemon Sallow   Cirrhia gilvago Copyright: Graham Ekins

Essex Field Club
Essex Field Club
registered charity
no 1113963
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Visit Our Centre

EFC Centre at Wat Tyler Country ParkWe are normally open to the public on Saturdays, Sundays and bank holidays 11am-4pm. We are also open on Wednesdays 10am-4pm.
Spring recording Record your Robin Record Common Frog Rana temporaria
Record Alexanders Smyrnium olusatrum Record Tawny Mining Bee Andrena fulva
Record Dark-edged Bee Fly Bombylius major
Record Spring Flower Bee Anthophora plumipes
Record cuckoo bee Melecta albifrons

Geology Site Account


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 et.al. 2001 (p.817,818), Lake et.al. 1986 (p.34 & 37)

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