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geology, geochronology, potassium-argon analysis, Ar/Ar, earth science, Yukon-Tanana upland
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geoscientificInformation, geology, geochronology, uranium-lead analysis, igneous rocks, sedimentary rocks, earth science, U/Pb, SHRIMP data, trace elements, Alaska, Fortymile River, Sixty Mile River, Ladue River, Chatanika River, Tok, Chicken, Eagle, Fairbanks, White Mountains, Divide Mountain, Taylor Mountain, Yukon-Tanana upland
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