Fig. 2: SEM images showcasing the textural features preserved in olivine-cored pelletal pyroclasts.
From: Melt stripping and agglutination of pyroclasts during the explosive eruption of low viscosity magmas
a A large image mosaic of an IHV complex pelletal pyroclast with b the accompanying trace and labelled features. Green represents the olivine crystal, red the homogenous melt, orange the complex melt and dark blue represents adhering droplets. c A close-up view of the olivine crystal—melt interface, where a homogeneous quenched melt layer (now glass) can be seen at the interface overlain in places by more crystal-rich material. The accompanying trace with feature identifications are shown in d at the same scale. e Preferential thickening of the coating within a depression on the olivine crystal surface. f Internal melt-filled cracks that connect to the surface and the melt coating. g A spreading droplet on top of the quenched, homogeneous layer. h Sticking, circular, undeformed droplets tacked on to the main pyroclast.
