Work today focused on operations 10, 14, and 15. In operation 10, I worked on clarifying the architecture by creating locus 5 to clear through rock fall. The matrix is mainly a medium brown silt. In operation 14, I worked on locus 6, a wash level to the north of the wall that bottomed out on a massive bedrock. Then I expanded this trench 2 meters to the north to pursue the continuation of the wall of locus 3. This expansion was locus 7, topsoil and dark brown alluvial wash. Obsidian blade recovered from locus 7.