Figure F6. A. Schematic cross section through a subaerial silicic lava low. The left side shows the internal textural variations arising from vesiculation, devitrification, and flow fragmentation. The right side shows the orientations of internal flow foliations and crude layering in flow margin talus breccia. B. The vertical section through the flow at the position is indicated in (A), showing the major textural zones (from McPhie et al., 1993; modified from Fink and Manley, 1987, and Duffield and Dalrymple, 1990).

Figure F6. A. Schematic cross section through a subaerial silicic lava low. The left side shows the internal textural variations arising from vesiculation, devitrification, and flow fragmentation. The right side shows the orientations of internal flow foliations and crude layering in flow margin talus breccia. B. The vertical section through the flow at the position is indicated in (A), showing the major textural zones (from McPhie et al., 1993; modified from Fink and Manley, 1987, and Duffield and Dalrymple, 1990).