Figure F18. Examples of high-temperature, ductile deformation structure that is recorded in some Hole U1309D rocks. A. Whole thin section showing a well-defined mylonite in gabbro cut by a fracture (Sample 304-U1309D-8R-1, 68–71 cm) (plane-polarized light; field of view [FOV] = ~2 cm). B. Brown amphibole vein crosscuts highly localized shear zone in mylonite with domains of recrystallized plagioclase and pyroxene (Sample 304-U1309D-9R-1, 71–73 cm) (cross-polarized light; FOV = 4 mm).
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