Sometimes human remains were deposited in the chambers over many centuries. For instance, at West Kennet Long Barrow in Oxfordshire, southern England, the earliest depositions of human remains were radiocarbon dated to the early-to-mid fourth millennium BCE, while a later deposition of human remains was found to belong to the Beaker culture, thus indicating a date in the final centuries of the third millennium BCE; this meant that human remains had been placed into the chamber intermittently over a period of 1500 years.