MBMG Staff

Contact information:

Jeffrey D. Lonn
Associate Research Geologist

Professional Experience

2009Present, Associate Research Geologist
19922009, Assistant Research Geologist, Montana Bureau of Mines and Geology

19881990, Engineering Geologist, Montana Department of Transportation

19841987, Exploration Geologist, Freelance



M.S.Geology, The University of Montana, Missoula

B.A.Biology, Colorado College, Colorado Springs


Professional Interests

Western Montana field geology

Structure and stratigraphy of the Belt Basin

Metallic mineral deposits


Outside Publications

Lonn, J., 1993, Phanerozoic mineralization in the Tobacco Root Mountains, Madison County, Montana. Extended Abstract. Northwest Geology 22:5–8.

Winston, D. and Lonn, J., 1988, Structural geology and Belt stratigraphy of the Tarkio area, Montana. Pp. 1–34 in R. M. Weidman, ed. Guidebook to the greater Missoula area: Tobacco Root Geological Society 13th Annual Field Conference

Lonn, J., 1984, Geometry of the western Montana thrust belt near Tarkio. Northwest Geology 13:25–31.