01811nam a2200445Ii 4500001001300000003000600013005001700019006001900036007001500055008004100070040003200111043001200143074001800155086001900173099001900192100003200211245016300243246008200406246010700488264008800595300007400683336000800757337001600765338001900781490003300800504005500833500002500888588009800913650003801011650002801049650002101077650002501098700003301123700003001156710004501186830005701231856004001288949001801328999001901346on1083264928OCoLC20190831131649.0m     o  d f      cr cn|||||||||190124s2018    vauab   ob   f000 0 eng d  aGPObengerdaepncGPOdMvI  an-us-ak  a0624 (online)0 aI 19.16:1814 F  aI 19.16:1814 F1 aBradley, Dwight C,eauthor.10aU-Pb geochronology and tectonic implications of a silurian ash in the Farewell terrane, Alaska /cby Dwight C. Bradley, Julie A. Dumoulin, and Dan B. Bradley.1 iAt head of title:aStudies by the U.S. Geological Survey in Alaska, volume 153 aUranium lead geochronology and tectonic implications of a silurian ash in the Farewell terrane, Alaska 1aReston, Virginia :bU.S. Department of the Interior, U.S. Geological Survey,c2018.  a1 online resource (iii, 12 pages) :bcolor illustrations, color maps.  btxt  bc2rdamedia  bcr2rdacarrier1 aProfessional paper ;v1814-F  aIncludes bibliographical references (pages 10-12).  aCRDP Program record.  aDescription based on online resource; title from PDF title page (USGS, viewed Jan. 24, 2019). 0aVolcanic ash, tuff, etc.zAlaska. 0aPaleontologyySilurian. 0aGeological time. 0aUranium-lead dating.1 aDumoulin, Julie A.,eauthor.1 aBradley, Dan B.,eauthor.2 aGeological Survey (U.S.),eissuing body. 0aU.S. Geological Survey professional paper ;v1814-F.40uhttps://purl.fdlp.gov/GPO/gpo115165  aBEVbFed Docs  c286359d286359