Figure AF1. (Na + K)A-site vs. AlIV (per formula unit) of amphiboles analyzed in this study. Squares = 13eCNK, open circles = 15eCNK, solid circles = H&B, crosses = all-Fe2+ methods.

Figure AF1. (Na + K)_A-site vs. Al^IV (per formula unit) of amphiboles analyzed in this study. Squares = 13eCNK, open circles = 15eCNK, solid circles = H&B, crosses = all-Fe²⁺ methods.