Figure F20. Total alkalies vs. silica diagram (after Le Bas et al., 1986) showing data for Leg 192 basalt and volcaniclastic rocks. Data for the Site 1187 basalt plot in the tholeiitic basalt field. The dashed line separates Hawaiian tholeiitic and alkalic basalts (Macdonald and Katsura, 1964).

Figure F20. Total alkalies vs. silica diagram (after Le Bas et al., 1986) showing data for Leg 192 basalt and volcaniclastic rocks. Data for the Site 1187 basalt plot in the tholeiitic basalt field. The dashed line separates Hawaiian tholeiitic and alkalic basalts (Macdonald and Katsura, 1964).