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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

Great Holland Pits Nature Reserve, GREAT HOLLAND, Tendring District, TM20221924, Potential Local Geological Site

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Site of geological interest with potential for geological education. Any significant excavations in the reserve should be recorded.


Site description

A former gravel pit in the Cooks Green Gravel (laid down by the Thames-Medway river) that is now an Essex Wildlife Trust nature reserve. No current visible exposure of gravel but there are level areas of gravel present beneath scrub that could easily be cleared to reveal a wide variety of rock types. These are mostly cobbles and boulders left behind by the quarry operations. There is an excellent opportunity here to promote geology by exposing these areas of gravel and allowing visitors to identify rock types and speculate on how they got here. The Cooks Green Gravel is about 600,000 years old.

The route of the River Thames and River Medway across the Tendring peninsula about 600,000 years ago during deposition of the Wivenhoe Gravel and Cooks Green Gravel. The present outcrops of these gravels are shown. Illustration © David Bridgland.


Tendring district in Cooks Green Gravel times.
Tendring district in Cooks Green Gravel times.

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Reference: Bridgland 1999

Geology Site Map
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