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Figure F5. Photomicrographs of sedimentary features in chert in stratigraphic Unit I, Hole U1350A. A. Large, dark, infilled burrow structure cutting across relict bedding in red chert piece. B. Relict bedding highlighted by porcellanite and radiolarians C. White porcellanite-infilled burrow structures within black chert. D. Thin burrow that has been completely replaced by pyrite within a black chert fragment. E. Pale porcellanite-infilled burrow cross section within black chert. Note halo of well-preserved radiolarians surrounding the burrow. F. Well-preserved radiolarians within glasslike silica of black chert piece.

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