Figure F139. Photomicrographs showing ductile and brittle-ductile structures linked to lava flow in the top part of massive Unit 1256C-18. A. Detail of the fold boxed in Figure F138 (Sample 206-1256C-8R-4, [Piece 5, 114-117 cm]; field of view = 10 mm; plane polarized light; thin section 25). B. Multiple folding of late magmatic veins. Sketch of the folds in the top left box: black lines outline the flow banding, blue and red lines = axial plane traces (Sample 206-1256C-8R-5 [Piece 3A, 18-21 cm]; field of view = 0.625 mm; plane polarized light; thin section 26).

Figure F139. Photomicrographs showing ductile and brittle-ductile structures linked to lava flow in the top part of massive Unit 1256C-18. A. Detail of the fold boxed in Figure F138 (Sample 206-1256C-8R-4, [Piece 5, 114-117 cm]; field of view = 10 mm; plane polarized light; thin section 25). B. Multiple folding of late magmatic veins. Sketch of the folds in the top left box: black lines outline the flow banding, blue and red lines = axial plane traces (Sample 206-1256C-8R-5 [Piece 3A, 18-21 cm]; field of view = 0.625 mm; plane polarized light; thin section 26).