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Text Description: 1.5 cm thick; phenocryst-rich pumice, rare pumice with thicker septa and fewer phenocrysts, trace amount of brown glass; in organic-rich silt; ~10 m above basal gravel and sand; field name 98SJP20 References:  A catalogue of late Cenozoic tephra beds in the Klondike Goldfields and adjacent areas, Yukon Territory |
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