Figure F6. Photomicrograph in plane-polarized light of Sample 187-1161A-4R-1, 105-109 cm (see "Site 1161 Thin Sections"), showing subophitic to intergranular groundmass texture typical of Type 3 fine-grained aphyric basalt. Olivine microphenocryst and groundmass crystals are totally replaced by Fe oxyhydroxides + clay. Cpx = clinopyroxene.