This sample was found at elevation 2140.144 mASL; 2.7 m from the NE edge of the trench, and also 2.7 m from the NW edge of the trench. This is definitely from the lighter, clayey matrix of locus 11 (and also Locus 3--it's the matrix that hugs the walls), and it has a couple decent-sized chunks, so it may be sample-able.