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Figure F45. Total alkali content (Na2O + K2O) vs. SiO2 classification plot for basaltic lava flows from Koko Seamount. Data from Nintoku and Suiko Seamounts are shown for comparison. The solid diagonal line is the alkalic-tholeiitic dividing line for Hawaiian basalt. Only three Site 1206 samples plot in the alkalic basalt field.

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