Figure 2

Geochemical distribution of glass in tephra, crystalline groundmass in lava, and lava whole rock data by emplacement date. (a) Total alkali vs silica (TAS) diagram, (b–g) Harker diagrams. Coloured spots are data measured for this work, and black and grey points represent literature data. Circles represent glass analysis, squares are crystalline groundmass, and triangles are whole rock data. Points measured in the filamentary structures are highlighted in light blue. Literature data from Castro and Feisel41 (C & F22), Pankhurst et al.46 (P22) and Day et al.77 (D22).