Figure F33. Photomicrographs of (A) vesicle-free, pale-yellow glass shard with thin brownish clay rim (Sample 200-1223A-3X-1, 112-114 cm; Unit 5; plane-polarized light) and (B) highly vesicular pale-yellow glass shard (Sample 200-1223A-3X-2, 71-73 cm; Unit 5; plane-polarized light).