The flat thin lenses seen most clearly on the left side of this close-up photograph are layer after layer of urine-compacted soil. The dark and light bands represent ash, charcoal and other living debris that was compacted by the repeated use of this area of the shelter as a latrine. The coprolites can be seen in the upper right. This photo taken late in the 1976 season depicts the south wall of the lower deposits of the north half of the Block B deposits. TAMU Anthropology archives.