William Ingersoll Rose , geology professor and noted volcanologist, died at home in Eagle Harbor, Michigan, on July 17. Born in Detroit and raised in Corrales, New Mexico, Bill’s passion for geology began early. At Dartmouth he participated in the Dartmouth Players, was a member of Delta Upsilon, majored in geography, and went on to earn his Ph.D. in geology from the College. Bill married Smith College graduate Nanno in 1967 and raised sons Chris and Jason in Houghton, Michigan. Bill taught geology at Michigan Technology University for 40 years, rising from assistant professor of petrology to serving for eight years as chair of the department of geological engineering and sciences. He concluded his career as research professor and volcanologist at Michigan Tech. He and his family traveled extensively for his volcano research, and Bill published more than 200 research articles and mentored dozens of graduate students now working in the field. In retirement Bill promoted “geoheritage”—scientific communication to help people realize the earth is guiding their lives in fundamental ways. His recently published book, How the Rock Connects Us: A Geoheritage Guide to Michigan’s Keweenaw Peninsula and Isle Royal, does just that. A devoted husband, father, grandfather, and volcanologist, Bill was dedicated to loving deeply, exploring the earth, and helping others understand geology and volcanoes. He is survived by Nanno, his sons and their wives, and five grandchildren. Donations may be made to the Bill Rose Geoscience Student Travel Fund at https://bit.ly/4fbUndk.