01637nam 2200445 a 450 991069763710332120081016141103.0(CKB)5470000002390593(OCoLC)262621010(EXLCZ)99547000000239059320081016d2005 ua 0engurmnu||||||||txtrdacontentcrdamediacrrdacarrier⁴⁰Ar/³⁹Ar and K-Ar geochronology and tectonic significance of the Upper Cretaceous Adel Mountain volcanics and spatially associated Tertiary igneous rocks, northwestern Montana[electronic resource] /by Stephen S. Harlan ... [and others]Reston, Va. :U.S. Dept. of the Interior, U.S. Geological Survey,2005.iv, 29 pages digital, PDF fileProfessional paper ;1696Title from PDF t.p. (viewed Oct. 16, 2008).Includes bibliographical references (pages 18-19).GeochronometryMontanaCraig RegionIgneous rocksMontanaCraig RegionGeology, StratigraphicCretaceousGeology, StratigraphicTertiaryRadioactive datingMontanaCraig RegionGeochronometryIgneous rocksGeology, StratigraphicGeology, StratigraphicRadioactive datingHarlan Stephen S1405201Geological Survey (U.S.)GPOGPOBOOK9910697637103321⁴⁰Ar3506621UNINA