Galena Sardinia. In the United States, it occurs most notably in the Mississippi Valley type deposits of the Lead Belt in southeastern Missouri, and in the Driftless Area of Illinois, Iowa and Wisconsin. Galena also was a major mineral of the zinc-lead mines of the tri-state district around Joplin in southwestern Missouri and the adjoining areas of Kansas and Oklahoma. Galena is also an important ore mineral in the silver mining regions of Colorado, Idaho, Utah and Montana. Of the latter, the Coeur d'Alene district of northern Idaho was most prominent. Galena is the official state mineral of the U.S. states
Mineral Exploration Research Centre deposits, volcanology, geochemistry, and alteration associated with hydrothermal copper-zine-(gold) volcanogenic massive sulfide ore deposits, structure, geochemistry, and alteration associated with hydrothermal orogenic lode gold deposits, mineralogy, geochemistry, and genesis of rare-element and rare-metal pegmatites, and the sedimentology of Mississippi Valley-type (MVT) Pb-Zn deposits and placer Au and U deposits. MERC and the Harquail School of Earth Sciences are a world-leaders in mineral deposits education, offering a Co-Op BSc in Mineral Exploration program, hosting the annual PDAC-sponsored Student-Industry Mineral Exploration Workshop, offering a fully modular ("block") Applied MSc degree in Mineral Exploration, and offering a PhD in Mineral Exploration and Precambrian