The top elevation was measured in the center. It represents the places where the black, loamy earth still is being found in WSI2, which is essentially in the center of the room. Around the walls we've begun to find the more clayey matrix. The width is actually the average; on the NW side, along the NW wall, the locus was 3.5 m wide; on the SE side, along the SE wall, the locus is 3.6 m wide.