The Montana Bureau of Mines and Geology has published B.A. Skipp, W.J. Perry, Jr., and S.U. Janecke's 2017 geologic map of the Lima Peaks 7.5' quadrangle, Beaverhead County, Montana. The map is available here: http://mbmg.mtech.edu/mbmgcat/public/ListCitation.asp?pub_id=31912&.