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Figure F156. A. Crystal-plastic deformation in oxide gabbro exhibiting a very sharp contact with less deformed zone (interval 305-U1309D-138R-3, 45–57 cm); shear zone = 2 cm at neck. Yellow box = location of B and C. B. Sharp boundary to the shear zone (Sample 305-U1309D-138R-3, 55–59 cm) (plane-polarized light; FOV = 2 cm). C. Same as B; cross-polarized light, FOV = 2 cm. Yellow box = location of D. D. Difference in the microstructure between the area affected by the shear zone and outside the shear zone margin (cross-polarized light; FOV = 11 mm). (Continued on next page.)

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