The Causewayed Enclosure at Orsett, Essex (TQ653806), was trial trenched in 1975 to determine the state of site preservation and confirm its postulated Neolithic date and site sequence. The enclosure consisted of three incomplete circuits of discontinuous ditch with an associated timber palisade slot lying inside and concentric to the middle ditch. Within the interior was an oval post hole structure of a con-temporary date. Quantities of Mildenhall style pottery and flint artifacts of the mid third millennium b.c. were recovered from the primary ditch silts and other features. A small quantity of Late Neolithic/Early Bronze Age wares came from the secondary ditch silts and the interior.Later phases on the site were represented by unenclosed Early Iron Age occupation, a Middle Iron Agesub-rectangular enclosure and Saxon ring-ditch burials.
The causewayed enclosure at Orsett, South Essex is the only enclosure of this type recognized from the County of Essex. It is a cropmark site with no surviving earthworks and was discovered during aerial reconnaissance by the Cambridge University Committee for Aerial Photography and independently by Jonathan Catton.The cropmark was interpreted as a Neolithic causewayed enclosure on the basis of its similarity to excavated enclosures of this form and date.
https://www.academia.edu/24700869/Excavations_at_a_Neolithic_Causewayed_Enclosure_Orsett_Essex_1975_1978_
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