L503, which was a small posthole, was apparently removed while taking down locus L536, but would have been on the border of the triangular area of compact, black matrix in the center of the locus. After photographing L536, we started a 1 m x 1 m probe (L537) in the NE corner of L536, just west of the LBA wall. The probe was dug in order to determine where bedrock was in the northern part of the trench, as well as see if the rocks (possible EBA wall) on the eastern side of the LBA wall continued under it.
We also excavated the triangular area of compact, black matrix in the center of the locus. The area started at a depth of 2282.25 m and ended at 2282.22 m. The matrix was a dark brown/black sandy clay loam. In the probe, after coming down ~ 8cm, the soil changed in color slightly to a darker brown, remaining a sandy loam. The change in color may be due to soil moisture or rodent turbation, of which we saw some evidence. Rocks started coming up in the NE corner of the probe at this level and continue down for another 15-20 cm. The soil around the upper layer of rocks is very loose, perhaps due to rodent burrowing. In the lower levels of the probe, the density of cultural material was virtually zero. Because of this, and because the rocks did not look like in situ architecture, we decided to end the probe.