Figure F33. Composite photomicrograph of the large shard at the top of B in Figure F32, Hole U1348A. The distinction between darker altered and lighter brown fresh glass is evident. Altered glass can be seen adjacent to vesicles and along fractures, reaching into the interior of the shard. The shard is divided into fracture-bounded segments, many of them delineated and rounded by alteration. Fibrous orange clays line two vesicles on the left. The white matrix is calcite (Thin Section 197; Sample 324-U1348A-23R-1, 116–122 cm).
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