ERRATUM PUBLICATION: 2019, v. 131, no. 3/4, p. 704, https://doi.org/10.1130/B31573E.1. First published 31 January 2019.
Several erroneous values were identified in Table 2 on page 824 that resulted from improper cell value referencing. All values are corrected and reflect the average compositions normalized to 100 grains. The corrected table is seen here.