Figure F18. A. CT image of a tectonic joint viewed along the core axis and perpendicular to strike. B. Photograph of the joint surface (interval 316-C0006F-18R-1, 89–102 cm). Macroscopic planarity of joint and plumose structures on the surface attest to mode-I opening. With a correction based on paleomagnetic data, the joint is oriented vertical and strikes 155°. The joint is located just below the zone of tectonic breccia located at 533–543 m CSF in Hole C0006F.
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