Erratum

Relationship between plagioclase An content and liquid An# in equilibrium for the H₂O-saturated (light gray field) and dry experiments (dark gray field) of Waters and Lange (2015). Superimposed are ranges in An content of plagioclase phenocrysts from this study, at their respective whole-rock (i.e., ~liquid) An# (black bars). The overlap of data ranges with the dry experiments suggests that most crystals are not in equilibrium with hydrous mafic arc melts. Rather, if formed from hydrous melts, as indicated by hydrous melt inclusions in Mexican arc samples, the liquid An# of their equilibrium melts must have ranged to much lower values (down to An_~10), i.e., crystals would have formed from much more evolved melts than those in which they are carried.