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Text Description: n.d. on deposit thickness; bubble-wall shards, trace amounts of brown glass. At muck–gravel contact. Field name GL99-58A References:  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 |
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