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Essex Field Club
Essex Field Club
registered charity
no 1113963
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We are normally open to the public at our centre at Wat Tyler Country Park every Saturday, Sunday and bank holiday between 11am and 4pm. We are also usually open on Wednesdays between 10am and 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


Newney Green Pit SSSI, NEWNEY GREEN, Chelmsford District, TL64820647, Site of Special Scientific Interest

 
 
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Site name: Newney Green Pit SSSI

Grid reference: TL 6482 0647

Brief description of site:

Former gravel quarry providing exposures of Kesgrave Sands and Gravels (laid down by a former route of the Thames) dating from the early Ice Age, overlain by boulder clay (till) laid down by the Anglian Ice Sheet about 450,000 years ago. Ancient temperate and arctic climate soil horizons were present in the Kesgrave Formation. Although the pit has been infilled, a small area has been retained as a geological SSSI.

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Details

The former Newney Green Gravel Quarry had exposures of Kesgrave (Thames) Gravel, with a Cromerian Palaeosol (fossil soil horizon), overlain by the Anglian boulder clay (till). Occasional patches of glacial gravel were also found, and an (Anglian) arctic structure soil was found to be superimposed on the Cromerian palaeosol marking a change from warm interglacial to intensely cold glacial conditions.

This site is of prime importance for the correlation between Pleistocene sites in the Thames and East Anglian areas. It is a vital locality in working out the sequence of events in the evolution of the Thames.

(text adapted from the SSSI citation).

The pit has now been infilled except for small area of the SSSI.



The succession at Newney Green Gravel Pit in 1978. The face shows the succession of Chalky Boulder Clay, decalcified at the base, resting on red and brown mottled sandy clays with involution structures which in turn pass down into bedded sands and gravels. Photo © British Geological Survey (P212173).

 

Hertfordshire puddingstone from Newney Green found by B.E.Brett
Hertfordshire puddingstone from Newney Green found by B.E.Brett
Newney Green Pit ice wedge polygons
Newney Green Pit ice wedge polygons

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Reference: Bridgland 1994 (p. 287-299)

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