Figure 17. Summary of lithologic characteristics in the subunits of Unit II at Site 1184, based on the facies defined in Table 2. "Wood" indicates approximate intervals in which pieces of wood were found. The uppermost interval is represented by two pieces, 1-2 cm long and <2 mm thick. At the other three wood-bearing levels, pieces of wood are as long as 6 cm. In the chromaticity plot, a = the variation between green (negative) and red (positive), and b = the variation between blue (negative) and yellow (positive) (Blum, 1997).