Evidence of bones from megafauna and extinct marsupials was found to be dated between 27,500 and 24,500 years old, but were not associated with the human occupation layers.

The 1980 excavation, carried out before some nearby construction work, was more extensive and discovered just two distinct occupation layers within the turret.

During the 1937 excavation, Leakey also discovered a much older occupation layer, dating to the Late Stone Age.

The excavations revealed occupation layers dating to the 14th century BCE, or Late Bronze Age.

The best dating evidence came in 1956, not only from the rampart itself and its silted ditch, but also from the occupation layer that it sealed.

The systematic excavation of the site has unearthed six successive occupation layers.

Although the excavations focused primarily on the Neolithic occupation layers of the site, evidence for later occupation was also attested.

Later occupation layers contained early Peterborough ware then the later Mortlake and Fengate varieties.

Several occupation layers were located prior to a stone flag floor being laid.

It is built on top of prehistoric and Roman occupation layers.