Title: ⁴⁰Ar/³⁹Ar and K-Ar geochronology and tectonic significance of the Upper Cretaceous Adel Mountain volcanics and spatially associated Tertiary igneous rocks, northwestern Montana
Subjects: Geochronometry, Igneous rocks, Stratigraphic Geology, Radioactive dating
Places: Montana, Craig Region
Time periods: Cretaceous, Tertiary