U-Pb geochronology and tectonic implications of a Silurian ash in the Farewell Terrane, Alaska

Online link https://pubs.usgs.gov/pp/1814/f/pp1814f.pdf
Description The Farewell terrane is an exotic continental fragment in interior Alaska that during the early Paleozoic was the site of a passive margin. We report a <sup>238</sup>U/<sup>206</sup>Pb zircon age of 432.9±3.0 Ma from a Farewell terrane ash in Mt. McKinle
Originators Bradley, Dwight C.; Dumoulin, Julie A.; Bradley, Dan B.; and Dumoulin, Julie A.
Publication U.S. Geological Survey Professional Paper 1814

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