Figure F31. Photomicrographs of shear zones. Top of core is at top of page. Bedding is shallowly dipping to the right, except in A where it is shallowly dipping to the left. A, C, E. Sample 319-C0009A-6R-1, 38.0–41.0 cm. B, D. Sample 319-C0009-6R-4, 71.0–76.0 cm). (A) Bedding-parallel layer across bottom right corner, and shear zone in upper left that is not bedding parallel. (B) Bedding-parallel zone with no evidence of shear. (C) Bedding-parallel layer across base of photo with Riedel (R) shears exhibiting sinistral shear within shear zone. (D) Shear zone forming gouge layer in a normal fault, indicated by offset of white layer at the top. (E) Shear zone forming gouge layer in a reverse fault, cutting a folded coarse-grained bed.
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