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The builders placed the bones of deer and oxen in the bottom of the ditch, as well as some worked flint tools.The bones were considerably older than the antler picks used to dig the ditch, and the people who buried them had looked after them for some time prior to burial.The stones are set within earthworks in the middle of the most dense complex of Neolithic and Bronze Age monuments in England, including several hundred burial mounds.Archaeologists believe it was constructed from 3000 BC to 2000 BC.The University of Buckingham's Humanities Research Institute believes that the community who built Stonehenge lived here over a period of several millennia, making it potentially "one of the pivotal places in the history of the Stonehenge landscape." The first monument consisted of a circular bank and ditch enclosure made of Late Cretaceous (Santonian Age) Seaford Chalk, measuring about 110 metres (360 ft) in diameter, with a large entrance to the north east and a smaller one to the south.It stood in open grassland on a slightly sloping spot.
Features mentioned in the text are numbered and shown on the plan, right.
The ditch was continuous but had been dug in sections, like the ditches of the earlier causewayed enclosures in the area.
The chalk dug from the ditch was piled up to form the bank.
If this were the case, it would advance the earliest known stone structure at the monument by some 500 years.
A small outer bank beyond the ditch could also date to this period.