Supplement to: McDermott, Frank; Delfin, Francisco G Jr; Defant, Marc J; Turner, Simon; Maury, R C (2005): The petrogenesis of volcanics from Mt. Bulusan and Mt. Mayon in the Bicol arc, the Philippines. Contributions to Mineralogy and Petrology, 150, 652-670, https://doi.org/10.1007/s00410-005-0042-7