Figure F3. The range and distribution of standard deviations for specific major element oxides calculated from all analyses of individual shards within tephra layers and tephra pods at Sites 1150 and 1151, giving an indication of geochemical homogeneity. A. SiO2. B. Al2O3. C. Na2O. D. K2O.

Figure F3. The range and distribution of standard deviations for specific major element oxides calculated from all analyses of individual shards within tephra layers and tephra pods at Sites 1150 and 1151, giving an indication of geochemical homogeneity. A. SiO₂. B. Al₂O₃. C. Na₂O. D. K₂O.