Fig. 4: Chemical compositions of glasses from the Archaeos Tuff.
From: Giant offshore pumice deposit records a shallow submarine explosive eruption of ancestral Santorini
a–c Incompatible trace element ratio plots showing the compositional similarity of onland (yellow dots) and offshore (red dots) samples of the Archaeos Tuff to those of the Early Centres of Akrotiri (>650–550 ka), and the differences with other volcanic centres of the South Aegean Volcanic Arc and the younger tuffs of Santorini (<530 ka). Data points denote means and standard deviations. All the analyses are glasses19, apart from Christiana, which are whole-rock lavas with >60 % SiO2. d Glass element spectra normalized to N-MORB for 38 offshore samples (at seven drill sites shown in red in Fig. 1) and 7 onshore samples (yellow locations in Fig. 1) of the Archaeos Tuff, showing the essentially identical compositions.
