Figure 4. A. Chlorite of a different setting from Sites 897, 899, and 900 plotted in the grid of Hey (1954). Fe# = Fe • 100/(Fe + Mg). B. Chlorite from ultramafics of Sites 897 and 899 plotted in a diagram (Al^IV + 2Ti + Cr - 1) vs. (Al^IV - 1) (from Laird, 1988). This plot illustrates the TK substitutions with clinochlore-chamosite as the origin. Analyses plotting above the 1/1 line from the origin show dioctahedral substitution and have octahedral vacancies.