Where the Gold Comes From in Southwest Montana

Boulder Batholith

By Rick and Susie Graetz | Office of Research and Creative Scholarship | University of Montana The late Dr. David Alt, author and one-time professor of geology at the University of Montana, explains why gold was found in Grasshopper Creek, site of Montana’s first major gold strike, and the surrounding gulches. “At Bannack, as in many … Read more

A Geology Primer for Beaverhead County and Southwest Montana

By Dr. Robert C. Thomas, Regents Professor of Geology | Environmental Sciences Department – University of Montana Western Southwest Montana’s geology records an impressive amount of Earth’s 4.5-billion-year history. The oldest rocks in the area are about 3.3 billion years old, formed through the metamorphism of even older rocks by heat and pressure during a … Read more