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Text Description: n.d. on deposit thickness; pumice, rare blocky shards, and rare bubble-wall shards. In grey sand overlying diamict and associated with sand wedge. Field name 1502a 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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