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Text Description: Maximum thickness of 7 cm. 8 to 9 m below surface in black, organic-rich silt with abundant rootlets. Light grey, discontinuous, repeats vertically. From Preece et al. (2011): pumice, rare blocky shards, and rare bubble-wall shards. References:  Characterization, identity, distribution, and source of late Cenozoic tephra beds in the Klondike District of the Yukon, Canada Changing ideas on the identity and stratigraphic significance of the Sheep Creek tephra beds in Alaska and the Yukon Territory, northwestern North America A catalogue of late Cenozoic tephra beds in the Klondike Goldfields and adjacent areas, Yukon Territory Dating Early and Middle (Reid) Pleistocene glaciations in central Yukon by tephrochronology |
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