Jeff Lonn


Geologist

Research Professor


Education
M.S., Geology
B.S., Biology
Contact Information

(406) 496-4177 (tel)

Email Jeff Lonn jlonn@mtech.edu

Program Affiliations
Geology
Research Interests
Geologic Mapping, Belt Stratigraphy, W. Montana Tectonics, Cenozoic Valley Deposits
Outreach & Presentations
Year Type Citation
2017 Presentation Lonn, J., 2017, The Proterozoic Lemhi Group: Presented at the Field Conference, Tobacco Root Geological Society, Leadore, Idaho, July 28, 2017.
2016 Presentation Lonn, J., Burmester, R.F., Lewis, R.S. and McFaddan M.D., 2016, Mesoproterozoic Lemhi Strata Represent Immense Alluvial Aprons That Prograded Northwest into the Belt Sea, Idaho and Montana: Presented at the 2016 Geological Society of America Rocky Mountain Section Meeting, Moscow, Idaho, May 19, 2016.
2014 Presentation Lonn, J., 2014, The Northern Extent of the Mesoproterozoic Lemhi Group, Idaho and Montana, and Stratigraphic and Structural Relations with Belt Supergroup Strata: Presented at the Geological Society of America Rocky Mountain and Cordilleran Joint Meeting, Bozeman, Montana, May 20, 2014.
2013 Presentation Lonn, J., 2013, Giant Folds and Complex Faults within Proterozoic Lemhi Subbasin Strata, Beaverhead Mountains, Montana and Idaho: Presented at the Montana Bureau of Mines and Geology, Butte, Montana, May 9, 2013.
Outside Publications
Citation
Burmester, R.F., Lonn, J.D., Lewis, R.S., and McFaddan, M.D., 2016, Stratigraphy of the Lemhi Subbasin of the Belt Supergroup: in MacLean, J.S., and Sears, J.W., eds., Belt Basin: Window to Mesoproterozoic Earth: Geological Society of America Special Paper 522, Chapter 1, 20 p.
Lonn, J.D., Burmester, R.F., Lewis, R.S., and McFaddan, M.D., 2016, Giant folds and complex faults in Mesoproterozoic Lemhi Strata of the Belt Supergroup, Northern Beaverhead Mountains, Montana and Idaho: in MacLean, J.S., and Sears, J.W., eds., Belt Basin: Window to Mesoproterozoic Earth: Geological Society of America Special Paper 522, Chapter 12, 24 p.
Burmester, R.F., Lewis, R.S., Lonn, J., and McFaddan, M.D., 2015, The Hoodoo is the Swauger and Other Heresies: Lemhi Subbasin Correlations and Structures, East-Central Idaho: Northwest Geology, v. 44, p. 73-88.
Lonn, J., 2015, Geologic Field Guide to the Cherry Creek Fault, A Possible Proterozoic Fault Near Helena, Montana: Northwest Geology, v. 44, p. 189-194.
McDonald, C., Lonn, J., Vuke, S., and Mosolf, J., 2015, Field Trip to the Nevada Lake Breccias, Powell County, Montana: Northwest Geology, v. 44, p.137-144.
McDonald, C., Mosolf, J., Lonn, J., and Vuke, S., 2015, Geologic Summary of the Elliston 30' x 60' Quadrangle, West-Central, Montana: Northwest Geology, v. 44, p. 9-18.
Burmester, R.F., Lonn, J.D., Lewis, R.S., and McFaddan, M.D., 2013, Toward a Grand Unified Theory for Stratigraphy of the Lemhi Subbasin of the Belt Supergroup: Northwest Geology, v. 42, p. 1-20.
Burmester, R.F., McFaddan, M.D., Lewis, R.S., and Lonn, J.D., 2013, What's the Swauger Formation Doing in the Eastern Salmon River Mountains, Idaho?: Northwest Geology, v. 42 p. 187.
Lonn, J.D., Lewis, R.S., and Burmester, R.F., 2013, Geologic Field Guide to the Freeman Creek Area Near Salmon, Idaho: Northwest Geology, v. 42, p. 199-204.
Lonn, J.D., Lewis, R.S., Burmester, R.F., and McFaddan, M.D., 2013, Geologic Field Guide to the Trail Gulch Area Near North Fork, Idaho: Northwest Geology, v. 42, p. 205-214.
Lonn, J.D., Lewis, R.S., Burmester, R.F., and McFaddan, M.D., 2013, The Complex Structural Geology of the Northern Beaverhead Mountains, Montana and Idaho: Northwest Geology, v. 42, p. 111-130.
Lonn, J.D., Othberg, K.L., Lewis, R.S., Burmester, R.F., Stanford, L.R., and Stuart, D.E., 2013, Geologic Map of the North Fork 7.5' Quadrangle, Lemhi Country, Idaho: Idaho Geologic Survey Digital Web Map 160, scale 1:24,000.
McDonald, C., and Lonn, J., 2013, Revisions of Mesoproterozoic and Cambrian Stratigraphy in the Pioneer and Highland Mountains, Southwestern Montana, and Resulting Implications for the Paleogeography of the Belt Basin: Northwest Geology, v. 42, p. 93-101.
Lonn, J.D., 2011, Belt Rocks and Structures of the Lewis and Clark Line in Alberton Gorge, Western Montana: A River Log: Northwest Geology, v. 40, p. 105.
McDonald, C., and Lonn, J. , 2010, Lewis and Clark Line, Montana: Tectonic Evolution of a Crustal-Scale Flower Structure in the Rocky Mountains: GSA Field Guides, v. 18, p. 1-20.
Lonn, J., and Lewis, R., 2009, Late Cretaceous Extension and its Relation to the Thin Stratigraphic Section in the Philipsburg Area: A Field Trip to Carpp Ridge: Northwest Geology, v. 38, p. 141-152.
Hargrave, P., Cox, B., and Lonn, J.D., 2006, The Trip to Leigh Lake: Belt Rocks, Big Faults, and Small Mines in the High Cabinet Mountains, Northwestern Montana: Northwest Geology, v. 35, p. 91-96.
O’Neill, J.M., Lonn, J.D., Lageson, D.R., and Kunk, M.J., 2004, Early Tertiary Anaconda Metamorphic Core Complex, Southwestern Montana: Canadian Journal of Earth Science, v. 41, p. 63-72.
Lonn, J.D., Lewis, R.S., and Winston, D., 2003, Belt Structure and Stratigraphy on the Sapphire Block, Western Montana: Northwest Geology, v. 32, p. 17-28.
Marvin, R.K., Metesh, J.J., Lonn, J.D., Madison, J.P., and Wintergerst, R., 1995, Abandoned-Inactive Mines Program in the Deerlodge National Forest: Volume III: Flint Creek and Rock Creek Drainages, Final Report to U.S. Department of Agriculture, USFS, p. 173.
Metesh, J.J., Lonn, J.D., Duaime, T.E., Marvin, R.M., and Wintergerst, R., 1995, Abandoned-Inactive Mines in the Deerlodge National Forest: Volume II: Cataract Creek Drainage, Final Report to U.S. Department of Agriculture, USFS, p. 163, May 1995.
Metesh, J.J., Lonn, J.D., and Hall, J.G., 1994, GIS Analysis: Geology-Land Type Associations, Basin and Cataract Creek Drainages, Final Report to USDA Forest Service, 14 p.
Winston, D. and Lonn, J., 1988, Structural Geology and Belt Stratigraphy of the Tarkio Area, Montana: in R. M. Weidman, ed. Guidebook to the Greater Missoula Area: Tobacco Root Geological Society 13th Annual Field Conference, p. 1–34.
Lonn, J., 1984, Geometry of the Western Montana Thrust Belt Near Tarkio: Northwest Geology v. 13, p. 25–31.