Figure F55. Typical photomicrograph of strongly silicified sample (Unit 25) from the lower portion of Hole 1188A, showing a fine-grained intergrowth of granular quartz and phyllosilicates (interval 193-1188A-21R-1, 20-24 cm, in simultaneous reflected and transmitted plane-polarized light; width of view = 0.7 mm. Photomicrograph ID# 1188A_103; thin section 26).