Stonehenge Stonehenge Stonehenge is a prehistoric monument in Wiltshire, England, west of Amesbury. It consists of a ring of standing stones, with each standing stone around high, wide and weighing around 25 tons. 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 surrounding circular earth bank and ditch, which constitute the earliest phase of the monument, have been dated to about 3100 BC. Radiocarbon dating suggests that the first bluestones were
Stonehenge geologists from University of Leicester and the National Museum of Wales announced the discovery of the exact source of some of the rhyolite fragments found in the Stonehenge debitage. These fragments do not seem to match any of the standing stones or bluestone stumps. The researchers have identified the source as a long rock outcrop called Craig Rhos-y-Felin (), near Pont Saeson in north Pembrokeshire, located from Stonehenge. On 10 September 2014 the University of Birmingham announced findings including evidence of adjacent stone and wooden structures and burial mounds, overlooked previously, that may date as far back as 4000 BC.