We focused on the emerging floor/wall which, by the time it was fully cleared, straddled loci 7 and 8. Not yet clear whether these rocks constitute a floor or a wall, nor how they relate to what we think is the citadel wall. The yellow/tan clay that first emerged yesterday roughly covered these rocks. We found two carbon samples in locus 7. The emergence of this floor/wall justified creating 3 new loci - 9, 10, 11. These are demarcated by the [possible] citadel wall and the floor/wall. [see daily plan].