Fig. 5
From: Evidence at source for the mid-fifteenth century eruption of Kuwae, Vanuatu
Total alkali vs. silica (TAS) diagram for samples from Robin et al. (1994)(Robin et al. 1994) and Witter and Self (2007)(Witter and Self 2007). Data by Witter and Self (2007)(Witter and Self 2007) are for individual samples. Data by Robin et al. (1994)(Robin et al. 1994) are averaged data for multiple samples from each stratigraphic unit