Figure F10. Core image of brownish dark gray, 34 cm thick silicified tephra layer with normal gradation from medium ash at the base to fine ash at the top. Tephra layer shows bioturbated in the upper part, transition into sediment above, a parallel laminated middle part, and a cross-bedded to massive coarser grained lower part (interval 334-U1381A-7R-1, 88 cm, to 7R-2, 11 cm).
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