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Thisanotia chrysonuchella
find out more... Thisanotia chrysonuchella Copyright: Ben Sale

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, check. 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

A-Z Geological Site Index

Ashdon Road Swallow Hole, SAFFRON WALDEN, Uttlesford District, TL56083908, Potential Local Geological Site

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Site name: Ashdon Road Swallow Hole

Grid reference: TL 5608 3908

Brief description of site:

A swallow hole is a depression in the ground in a limestone or chalk area into which a stream disappears underground. Some swallow holes are not obvious on the surface and are merely a point where a stream appears to dry up as it percolates through its gravel bed to continue its journey underground.

An example of the latter is in the valley of The Slade where, during most times of the year, the stream disappears underground as it flows from the boulder clay plateau onto the Chalk at a point adjacent to the public footpath midway between Martins Wood and the Ashdon Road.


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Reference: Whitaker & Thresh 1916 (p.47-48)

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