Figure F9. Composition of glasses in glass grains (fresh and devitrified glass) and in the groundmass of basalt and dolerite grains, Hole 1256D. A. CaO vs. XMg. B. Al2O3 vs. XMg. C. TiO2 vs. XMg. D. Na2O vs. SiO2. XMg = Mg/(Mg + FeT). Crosses = mean error bars for microprobe analyses.
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