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Figure F304. Fractures in sheeted dikes. A. Drilling induced fractures (interval 312-1256D-184R-1, 1–16 cm). B. Less than 1 mm wide white fractures interpreted to be drilling induced (interval 312-1256D-202R-1, 15–23 cm). C. Empty vein or fracture in thin section (Thin Section 1; Sample 312-1256D-173R-1, 39–42 cm) (cross-polarized light; FOV = 2.25 mm). (Continued on next page.)

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