A series of burnt mounds, succeeded by a couple of dozen round pits. All the mounds involved low heaps of heat cracked pebbles in a matrix of soil blackened by comminuted charcoal. Not all seem to have involved a pit or trough. Three such troughs did occur, each oblong and measuring up to 2m in length, two having slots cut in the floor, whereas a third contained a slab of oak laid flat on the pit base and was associated with postholes, a hearth and a deeper pit which may have been a well or tank. The "water pits" at the dune margin were generally circular and c 1m deep. Some retained organic structural elements (including) 2 hollowed logs, 3 bark cylinders … a soil mark cylinder and adjacent bark cylinder were held in place initially by two large unabraded sherds from a single late BA jar. As far as we are aware, these extraordinary bark-lined pits are without parallel in British prehistory. They may have been intended to tap ground water. In another pit, the lower portion of a tub carved from oak, possibly late BA/ IA. It appears that the burnt mounds and pits lay at the margin of a marshy area rather than a river course. (1)
See L11958 for nearby pit alignment, L11959 for ditches, L11960 for pits on dune.

<1> TPAU, Aug 2006, Interim Report Upon Archaeological Excavations At Girton Quarry in 2005, pp 2-6 (Unpublished document). SNT2320.