The monument has been tentatively dated to between about 3000 and 2400 BC.
Radiocarbon dating of
antler tools found at the site has provided only an approximate date of 2469 to 2286 BC for the dismantling of the stones. Tests on an antler pick found at the bottom of a stonehole have so far failed, due to inadequate collagen in the sample. Excavation revealed several stone settings that are thought to have been erected some time between 3400 and 2500 BC, due to two
flint chisel arrowheads being found that are in a style commonly used during that period. It is estimated that there may have been as many as 27 stones in a circle in diameter.
Charcoal was found in some holes, suggesting that burning may have taken place there. One suggestion is that the
henge was a site for
cremations. Within the stone circle there were imprints of the bases from the original stones, which have been compared to the bluestones located in Stonehenge and have been found to have matching dimensions. The name "Bluestonehenge" is derived from the discovery of small stone chips in some of the stone settings. These
bluestones are also found in Stonehenge and consist of a wide range of rock types originally from
Pembrokeshire, west Wales, some away. Archaeologist
Mike Parker Pearson suspects that any bluestones in the circle may have been removed around 2500 BC and incorporated into Stonehenge, which underwent major rebuilding work at about that time. The stone circle settings were surrounded by a henge, comprising an ditch and outer bank which appears to date from approximately 2400 BC. Unlike Stonehenge, this monument does not appear to have any significant solar or lunar orientations. ==Context==