Welcome to the online catalog for the Montana Bureau of Mines and Geology (MBMG). Our catalog contains all Bureau publications as well as U.S. Geological Survey publications related to Montana's geology, hydrogeology, etc.
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Interpretations of new and previous lead isotopic data for Late Cretaceous to Eocene satellite intrusions, Butte granite, volcanic rocks, and base metal veins of the Boulder Batholith, southwestern Montana