Figure F65. A botryoidal aggregate of opaque material (probably Mn oxyhydroxide) in a calcite vein with smectite locally lining the vein walls in Sample 192-1185B-5R-8 (Piece 3, 31-33 cm) (field of view = 2.8 mm; plane-polarized light; photomicrograph ID# 1185B

Figure F65. A botryoidal aggregate of opaque material (probably Mn oxyhydroxide) in a calcite vein with smectite locally lining the vein walls in Sample 192-1185B-5R-8 (Piece 3, 31-33 cm) (field of view = 2.8 mm; plane-polarized light; photomicrograph ID# 1185B_196).