Figure F5. Detail of volcanic ash layers in Subunit IA, Holes C0011C and C0011D. Ash layers occur together with green bands in clay deposits, likely resulting from the accumulation of iron (Fe) in such bands, as revealed by XLF core scanning of green bands in comparable core sections (Fig. F6). A. Volcaniclastic silt grading upward into light brown clay with iron bands. B. Detail of a brown volcanic ash layer older than the Pink volcanic ash. Fe-rich bands are visible below the ash layer. C. Core photo showing a series of stacked volcaniclastic sand layers with erosional bases and fining-upward trends typical of fine-grained turbidite sequences. T = turbidite sequences.
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