Aeromagnetic interpretation of the Medfra Quadrangle, Alaska
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Geology topics
Publications and source records attributed to W. W. Patton.
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Recently discovered deposits of obsidian in the Koyukuk valley may be the long-sought-for source of obsidian found in archeological sites in northwestern Alaska. Obsidian from these deposits compares favorably in physical characteristics and sodium-manganese ratio with the archeological obsidian, and there is evidence that the deposits have been "mined" in the past.
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