MSH plagioclase Ba and Sr compositions of unresorbed cores, surficially resorbed cores, and pervasively resorbed cores in (a) 1982 dacite, (b) Castle Creek age basalt, (c) quenched magmatic inclusions (QMI), and (d) mush inclusions. Error bars are 1 SE standard errors of the analyses. Plagioclase compositions overlap with published data for MSH since 1980 (yellow field, Kent et al., 2008) and show no systematic differences between different core types. Published compositional data for tertiary gabbros (green field, Kent et al., 2008) and Cave basalts (orange field, Berlo et al., 2007) are also given.