Figure F11. Core photos highlighting the lithologic and textural characteristics of tuffaceous sandstones in Unit II. A. Fining-upward trend in the uppermost tuffaceous sandstones defining the top of Unit II (Section 333-C0011D-46X-4). B. Detail of coarse sand with gravely clasts within Unit II (Section 47X-1). The tuffaceous sandstone is heterolithic, with clasts presenting lithologies varying from pumice to mudstone and volcanic rock fragments. (C) Sections 50X-3 and (D) 51X-2 presenting details of tuffaceous sandstones in Unit II showing cored sediment composed of heterolithic gravel, mudstone clasts, and coarse sand. P = pumice, M = mudstone.
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