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Text Description: 0.5 cm thick; colourless to dark brown pumice, blocky shards and platy shards; tephra bed sample contained large amounts of detrital mineral contents; in uppermost part of laminated silt and sand with fine gravel lenses; on strath 18 m above Sixtymile River; 28 cm above top of bench gravel; field name JJO235 References:  A catalogue of late Cenozoic tephra beds in the Klondike Goldfields and adjacent areas, Yukon Territory Revision of the tephrostratigraphy of the lower Sixtymile River area, Yukon Territory, Canada |
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