Berg, R.B., 2009. “Montana sapphires – past, present, and future” Preprint 09-029, SME Annual Meeting, February 22-25, 2009, Denver, Colorado, 8 p.

Berg, R.B., 2009. “Mineralogy of a channel sample of the titaniferous magnetite bed in the Virgelle Formation in north-central Montana” Montana Bureau of Mines and Geology Report of Investigation 19, 14 p.

Berg, R.B., 2009. “Geology of the southwestern part of the Rock Creek sapphire district, Granite County, Montana” Northwest Geology, v. 38, p. 127-140.

Berg, R.B., 2009, “Geologic map of the Black Mountain 7.5’ quadrangle, southwestern Montana” Montana Bureau of Mines and Geology Open-file Report MBMG 587, 11 p text, map scale 1;24,000.

Berg, R.B., Gammons, C.H., and Arehart, G.B., 2008, Preliminary oxygen isotope values for Montana sapphires [abs.]: Geological Society of America Abstracts with Programs, v. 40, no.6, p. 254.

Berg, R.B., 2008, Geologic map of the Choteau 30’ x 60’ quadrangle, north central Montana: Montana Bureau of Mines and Geology Open-file Report 571, 14 p. text, map scale 1:100,000.

Berg, R.B., 2007, Preliminary geologic map of part of the Choteau 30’ x 60’ quadrangle, north central, Montana: Montana Bureau of Mines and Geology Open-file Report 558, 13 p. text , map scale 1:100,000

Berg, R.B., 2007, Sapphires in the Butte – Deer Lodge area, Montana: Montana Bureau of Mines and Geology Bulletin 134, 59 p.

Berg, R.B.—Cerino, M.T., Childs, J.F., and Berg, R.B., 2007, Talc in southwestern Montana: Northwest Geology, v. 36, p. 9-22.

Berg, R.B., and McCulloch, R., 2007, Montana’s industrial minerals [abs.]: Meeting Handbook, 43rd Forum on the Geology of Industrial Minerals, Boulder, Colorado, p. 12,13.

Berg, R.B., 2007, Montana sapphire deposits and the potential for new discoveries [abs.]: Final Program, Northwest Mining Association’s 113th Annual Meeting, Spokane, Washington, p. 26,27.

Berg, R.B.—Berger, A. L., and Berg, R.B., 2006, The Silver Bow sapphire occurrence, Montana:  Evidence for a volcanic bedrock source for Montana’s alluvial sapphire deposits:  Economic Geology, v. 101, p. 679 – 684.

Berg, R.B.—Twidwell, L.G., Gammons, C.H., Young, C.A., and Berg, R.B., 2006, Summary of deepwater sediment/pore water characterization for the metal-laden Berkeley Pit Lake, Butte, Montana: Mine Water and the Environment, V. 25, no. 2, p. 86-92.

Berg, R.B., and Cooney, C.F., 2006, The importance of surface features and adhering material in deciphering the geologic history of alluvial sapphires – An example from western Montana [abs.] Gems and Gemology, v. 42, no. 3, p. 145.

Berg, R.B., 2006, Geologic map of the Upper Clark Fork Valley between Bearmouth and Missoula, southwestern Montana: Montana Bureau of Mines and Geology Open-file Report MBMG 535, 17-p. text, map scale 1:50,000.

Berg, R.B.,  2005, “Geologic Map of the Upper Clark Fork Valley between Garrison and Bearmouth, Southwestern Montana,” Montana Bureau of Mines and Geology Open-File Report MBMG 523, 18-p. text and map at a scale of 1:50,000.

Berg, R.B. and Berger, A.L., 2005, “Evidence for a Metamorphic Origin of Sapphires in an Alluvial Deposit near Butte, Montana,” [abs.] Geological Society of America Abstracts with Programs, v. 37, no. 6, p. 6.

Berg, R.B.—Cox, B.E., and Berg, R.B., 2005, “Two Medicine Volcanics near Augusta, Montana: Discussion and Field Trip Guide,” in Gibson, R.I., and Thomas, R.C., eds., Northwest Geology, v. 34, p. 102-108 (30th Annual Field Conference of the Tobacco Root Geological Society).

Berg, R.—Twidwell, L. G., Berg, R., Young, C., "Deep Water Sediment/Pore Water Characterization from an Acidic Metal-Laden Pitlake," Proceedings 1st International Conference Advances in Mineral Resources Management and Environmental Geotechnology, MJMP&EP, June 7-9, 2004, Chania, Crete, Greece, Heliotopos Conferences, Athens, Greece (ISBN:960-88153-0-4), pp. 507-12.

Berg, R. B., 2004, Geologic map of the Deer Lodge and Conley's Lake 7 1/2' Quadrangles, Powell County, Southwestern Montana: Montana Bureau of Mines and Geology Open-file Report MBMG 509, map scale 1:24,000 with cross sections and 12 p. text. 

Berg, R. B., 2004, Probable bedrock source of sapphires in alluvial deposits north of Butte, Montana, in Castor, S.B., Papke, K.G., and Meeuwig, R.O., Eds., Betting on Industrial Minerals, Proceedings of the 39th Forum on the Geology of Industrial Minerals: Nevada Bureau of Mines and Geology Special Publication 33, p. 23-30.

Berg, R. B., and Equall, N., 2004, Scanning electron micrographs of sapphires from alluvial deposits in Southwestern Montana: Montana Bureau of Mines and Geology Open-file Report MBMG 491. Released as CD with interpretations of surface textures.

Berg, R. B., and Hargrave, P., 2004, Geologic map of the Upper Clark Fork Valley, southwestern Montana: Montana Bureau of Mines and Geology Open file Report MBMG 506, map scale 1:50,000 with cross sections and 19 p. text.

Berg, R.B., and Cox, B.E., 2001 (actually released Jan. 2002) Zeolite occurrences in western Montana with particular emphasis on the Grasshopper Creek deposit: Montana Bureau of Mines and Geology Bulletin 132, 46 p. 

Berg, R.B., and Dahy, J.P., 2002, Montana sapphires and speculation on their origin: in Scott, P.W., and Bristow, C.M., eds., Industrial Minerals and Extractive Industry Geology: Geological Society, London, p. 199-204. 

Berg, R.B., 2002, Probable source of alluvial sapphires in western Montana [abs.]: Geological Society of America, 2002 Abstracts with Programs, v. 34, no. 4, p. A-55. 

Berg, R.B., 2002, Montana Sapphire deposits [extended abstract]: Gemstone Deposits of Colorado and the Rocky Mountain Region, Sept. 7-12, Golden, CO: Program and Abstracts, p.18-22. 

Berg, R.B., 2002, Geologic map of the Valier 30' x 60' quadrangle, northwestern Montana: Montana Bureau of Mines and Geology open-file report 453, 1:100,000 scale map and 10 p. text. 

Berg, R.B., 2002, Geologic map of the Cut Bank 30' x 60' quadrangle, northwestern Montana: Montana Bureau of Mines and Geology open-file report 454, 1:100,000 scale map and 10 p. text. 

Berg, R. B. and Vuke, Susan, 2002, Geologic map of the Fort Benton 30' x 60' quadrangle, north-central Montana: Montana Bureau of Mines and Geology open-file report 460, 1:100,000 scale map and 12 p. text.