[3] The site exposes a succession of Pleistocene levels, with an interglacial between two glacial periods.

The site has plant microfossils rare or unique in Britain, and according to Natural England's description in 1992, it may become the type site for a previously unrecognised British early middle Pleistocene interglacial.

The main one is L-shaped, forming the sloping south-east and north-east borders of a water filled pit.

A footpath between Slough Lane and Park Farm runs along its north-east boundary.

East of the main site is a small linear feature which has been filled in.