The basalt rocks of the SU are of a similar shape and size to the stones that compose the wall made up of SU 2290 - SU 2292, which borders the road at the eastern limit of Area C. The stones seem to have been disturbed prior to the accumulation of SU 2308, so it is possible that this disturbance is in part related to the drainage trench 2206, as SU 2321 borders the southern limit of SU 2206.