According to Burl . ".”Parts of the ditch are 2.4 metres above the present water table of the Kennet and presumably even higher in the Neolithic , that and the lack of silting suggests that there was no moat ."

Mike Allen "The excavation and recording of the Avebury ditchsequence accompanied by a full sampling for land snails, soils, pollen and charred remains to provide a key, long palaeo-environmental and chronological sequence for this monument." From "Archaeological Research Agenda for the Avebury World Heritage Site ".Suggests that there has been no palynology ,malacology etc.