Extended Data Fig. 3: Scanning electron micrographs of experimental products showing additional transitions between fractures, vesicles, and broken crystals.
From: Fracturing and healing of basaltic magmas during explosive volcanic eruptions
a-c, Progressive zooms into the terminal part of a large fracture (same as in Fig. 3a), with viscous healing isolating vesicles of variable size. d-i, Transitions between small, fracture-derived vesicles (d,e) and broken crystals with open (f-h) and glass-filled fractures (g,i). j-k, Train of vesicles within one experimental product (j). Vesicle alignment and the surrounding broken crystals (k) reveal their fracture-related origin. l, Wisps of Fe-rich glass marking sutured fractures. m, Viscous healing dispersing crystal fragments and forming flow banding of Fe-rich melt. n,o, Flow banding of Fe-rich melt induced by syn-experimental deformation of the melt after fragmentation, with entrained broken crystals (o). Red boxes are enlarged in the subsequent panel.
