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Essex Field Club
Essex Field Club
registered charity
no 1113963
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EFC Centre at Wat Tyler Country ParkIn January we are only open to the public at our centre at Wat Tyler Country Park on Wednesdays 10am-4pm.
Autumn recording Record Grey Squirrel Record Fly Agaric
Record Ivy Bee
Record Wild Teasel
Record Sloe, Blackthorn
Record Garden Spider Record Nigma walckenaeri spider

Geology Site Account

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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

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