Figure F44. Compositions of volcanic rocks from all Leg 183 basement recovery sites (Fig. F15) on the Na₂O + K₂O vs. SiO₂ classification diagram of Le Bas et al. (1986). For comparison, fields are also indicated for volcanic rocks recovered from Kerguelen Plateau drill sites 738, 747, 748, 749, and 750 (Alibert, 1991; Davies et al., 1989; Mehl et al., 1991; Salters et al., 1992; Storey et al., 1992; Weis et al., 1989).