Essex Field Club on Facebook

Video about the Club

Eriocrania sangii
find out more... Eriocrania sangii Copyright: Stephen Rolls

Essex Field Club
Essex Field Club
registered charity
no 1113963
HLF Logo A-Z Page Index

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

Coombe Green Sand Pit, GREAT WARLEY, Brentwood District, TQ57669045, Potential Local Geological Site

show OS map    

Site name: Coombe Green Sand Pit (disused), Great Warley.

Grid reference: TQ 5766 9045

Brief description of site:

Just south of Stonyhills Farm, Great Warley is a triangular wood bounded by three lanes. In it is a shallow, overgrown sand pit which has a very small exposure of typically fine-grained Bagshot Sand. Exposures of Bagshot Sand are extremely rare in Essex.



Bagshot Sand is as a result of the gradual shallowing of the London Clay Sea about 50 million years ago. The sediment being deposited on the subtropical sea floor started as a mud that we now know as London Clay and became more and more sandy until eventually it consisted entirely of the fine yellow sand we now call Bagshot Sand. This sand was probably laid down across most of Essex in a great complex of river deltas and all that now remains of it are isolated patches on the tops of these hills in south Essex, the rest having been removed by the intense erosion of the Ice Age.

This pit is shown on the OS map of 1920 and was visited by the Geologists’ Association in 1915 (Boswell 1915).


if you have an image please upload it

Reference: Boswell 1915 (p.227)

Geology Site Map
A-Z Geological Site Index