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Figure F18. Core images and thin section photomicrographs of the sutured boundary between gabbro and olivine gabbro intervals in the Layered Series, Hole U1415J. Contacts are shown with red dashed lines. The boundary is defined by differences in grain size and modal mineralogy (Sample U1415J-8R-3 [Piece 7, 31–41 cm]). A. Close-up core image. B, C. Photomicrographs of Piece 7 (35–38 cm); Thin Section 54, under (B) plane-polarized and (C) cross-polarized light.

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