Figure F56. Photomicrographs in plane-polarized light showing secondary minerals in basalts from Hole 1179D. A. Vesicles with celadonite and collomorphic FeOOH/hematite (Sample 191-1179D-14R-2 [Piece 15B, 117-119 cm]) (see "Site 1179 Thin Sections"). B. Smectite replacement spots and smectite fissure (Sample 191-1179D-12R-2 [Piece 1A, 1-3 cm]) (see "Site 1179 Thin Sections"). C. Olivine and plagioclase replaced by smectite and/or celadonite + FeOOH (Sample 191-1179D-11R-1 [Piece 4A, 99-101 cm]) (see "Site 1179 Thin Sections"). D. Smectite and celadonite replacing groundmass (Sample 191-1179D-12R-4 [Piece 1D, 83-86 cm]) (see "Site 1179 Thin Sections").