Fig. 9

Bivariate plots of (a) Cr/la ratio to Li/Na2O ratio showing the sub-groups of v-Na-Ca glass, and (b) Al2O3-Ce showing different correlation in each sub-group

Bivariate plots of (a) Cr/la ratio to Li/Na2O ratio showing the sub-groups of v-Na-Ca glass, and (b) Al2O3-Ce showing different correlation in each sub-group