The earthwork remains may possibly been a henge commanding magnificent views in all directions.
It has been suggested that it later became a henge monument, although the position of its surrounding ditch outside its timber-faced bank would be unusual.
An old road through the henge was to be straightened and improved and was going to cause considerable damage to the archaeology.
Integration is thought to have been peaceful, as many of the early henge sites were seemingly adopted by the newcomers.
The henge, although clearly forming an imposing boundary to the circle, has no defensive purpose as the ditch is on the inside.
The pillars are capped with lintels, completing the circle, and a 5 m-tall obelisk marks the center of the henge.
The henge portion has given its name to a class of monuments known as henges.
The henge is surrounded by two ditches and a bank.
