40Ar/39Ar and K-Ar geochronology and tectonic significance of the Upper Cretaceous Adel Mountain volcanics and spatially associated Tertiary igneous rocks, northwestern Montana - Harlan, Stephen S.; Geological Survey (U.S.) (Reston, Va. : U.S. Geological Survey ; Denver, CO : U.S. Geological Survey, Information Services [distributor], 2005)
Includes bibliogr.l references (p. 18-19).
Keywords: Geochronometry -- Montana -- Craig Region; Rocks, Igneous -- Montana -- Craig Region; Geology, Stratigraphic -- Cretaceous; Geology, Stratigraphic -- Tertiary; Radioactive dating -- Montana -- Craig Region