Figure F48. Ti-Zr-Y/3 diagram from Pearce and Cann (1973) showing low-K tholeiites (solid circles) and high-K suite (open circles) of Woodlark Island (Ashley and Flood, 1981) along with the average value for the Hole 1109D dolerite. Fields of high-K tholeiites, "ocean-floor" (= mid-ocean ridge) basalts, calc-alkali basalts, and "within-plate basalts" are shown.