Figure F16. Core photographs showing increasing alteration of pumiceous gravel units downhole at Site C0014. A. Incipient devitrification of pumice clasts and partial alteration of fine-grained matrix to pale clay (interval 331-C0014B-2H-3, 95–114 cm). B. Increased breakdown of pumice structure to soft pale siliceous aggregates with increasing pale clay (interval 331-C0014B-2H-4, 75–94 cm). C. Complete loss of pumice competency (interval 331-C0014B-2H-5, 70–89 cm). D. Remnant pseudoclastic texture after pumice (pale mottling) in clay (interval 331-C0014B-3H-2, 18–37 cm).
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