40Ar/39Ar and K-Ar geochronology and tectonic significance of the Upper Cretaceous Adel Mountain volcanics and spatially associated Tertiary igneous rocks, northwestern Montana

by Stephen S. Harlan ... [et al.].
Reston, Va. : U.S. Geological Survey, 2005.
Physical description
iv, 29 p. : col. ill., maps (some col.) ; 28 cm.
U.S. Geological Survey professional paper 1696.

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