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Fig. 4 | Journal of Applied Volcanology

Fig. 4

From: Challenges of determining frequency and magnitudes of explosive eruptions even with an unprecedented stratigraphy

Fig. 4

Whole-rock major element variation diagrams showing the compositional range of units P to Y. A = Andesite, B = Basalt, B-A = Basaltic-Andesite, TB-A = Tholeiitic Basalt-Andesite, TA = Tholeiitic Andesite. Units U, W and Y define a differentiation trend from basaltic-andesite (54.2 wt.% SiO2) to high-Si andesite (60.8 wt.% SiO2). Units P and S are intermediate between units U and Y

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