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Text Description: Sample 11-CB-4-4 269, IGSN: BOF000008. Yielded the most material for microanalysis. The tephra contains a bimodal rhyolitic glass. Most shards are smaller than 40 mm, but a few are up to 60 mm. Blocky, bubble-wall and tricuspate fragments are common. Slightly to moderately vesicular pumice is also present. References:  Early and late Holocene glacial fluctuations and tephrostratigraphy, Cabin Lake, Alaska |
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