Figure F309 (continued). C. Whole-thin section scan (Thin Section 33; Sample 312-1256D-194R-1, 8–13 cm) (plane-polarized light). D. Internal structure of a vein with inclusions of altered wallrock, elongate quartz grains, and locally strained quartz, collectively indicating slightly oblique opening with intervals of shear displacement (Thin Section 33; Sample 312-1256D-194R-1, 8–13 cm) (plane-polarized light; field of view = 4.5 mm). E. Same as D. F. Strained grains of quartz in vein shown in C–E. G. Face-on view of slickenside in gabbro (Sample 312-156D-231R-2, 77–85 cm); slickenlines indicate strike-slip displacement.
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