This appears to be a natural accumulation of soil, possibly related to a drainage feature that now appears to be plugged-up at the bottom of wall SU 6194. The deposit of soil with stones and anthropic material runs underneath feature SU 6283, meaning the soil was deposited at an earlier time than the later small wall SU 6283. It appears that this deposit may have once been below floor level in G-20, especially if it is a result of the earlier drain feature now plugged in wall SU 6194.