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Figure F17. Photomicrograph of a thin section from a chip cut parallel to the core, Hole U1357A (Sample 318-U1357A-21X-CC, 3.5–7 cm). The diamict contains angular rock fragments of metasediments and volcanic and igneous rocks, as well as discrete mineral grains including abundant quartz sand grains. Some of the metasedimentary rock fragments, although angular in appearance within the diamict, contain rounded intraclasts. The matrix is largely mudstone with minor carbonate. Carbonate spar occurs as cements infilling minor voids and fractures. Cross-polarized light.

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