16th May 2009, 03:13 PM
OOOh, I once came across a ditch slot where the oldest (outside) fill had been dug out to the point where it petered out toward the base. This was a big ditch, nearly 3m across. When I asked what the excavator thought the feature was and how the fill related to it he shrugged his shoulders and said, "dunno, but I think it's manmade." This was someone with nearly 2 years commercial experience according to the cv.