A superficial layer of dry silt covering the glariat road surface. It was truncated on the north by 4002, and truncated on the west by an unknown cutting action. there was a narrow orange-brown strip revealed on the east side with appears to line up with the edge of the glariat road north of the drainage channel. The SE edge covers the end of wall 4008 and the apparent cut in the glariat for the construction of this wall. the western section of the road has a possible cut which is highly irregular between the road and the western excavation limit. The silty gray layer 4015 is most likely a result of a past-abandonment accumulation over the glariat and in the cuts on the W. 4016 filled through the glariat to the W retaining wall (2292).