Figure F32. Rounded, quartz-rich patch representative of those in several units in Hole 1188F. These domains consist of relatively coarse, mosaic quartz aggregates and have sharp margins with the enclosing volcanic groundmass, which in this sample consists of fresh plagioclase, secondary quartz, and a trace of anhydrite (Unit 72; interval 193-1188F-43Z-1, 67-69 cm; width of view = 5.5 mm. Photomicrograph ID# 1188F_112; thin section 111). Arrow = boundary between patch (left) and groundmass (right).

Figure F32. Rounded, quartz-rich patch representative of those in several units in Hole 1188F. These domains consist of relatively coarse, mosaic quartz aggregates and have sharp margins with the enclosing volcanic groundmass, which in this sample consists of fresh plagioclase, secondary quartz, and a trace of anhydrite (Unit 72; interval 193-1188F-43Z-1, 67-69 cm; width of view = 5.5 mm. Photomicrograph ID# 1188F_112; thin section 111). Arrow = boundary between patch (left) and groundmass (right).