Little information is available on the production of this district.
The area is underlain by sedimentary rocks of upper Paleozoic age, typically limestone and quartzite of the Madison or Quadrant formation. These sediments are folded and faulted with intrusions of stock-like masses of granite (Sahinen 1935).
BOUNDARIES OF THE DISTRICT
The Big Muddy District is stated by Sahinen (1935) to be at the headwaters of Big Muddy Creek about 10 miles west of Dell. Like other unmineralized areas, its boundaries appear to be those left out of districts with active mining. Figure 1 shows the district as defined by Sahinen (1935).
HISTORIES OF SELECTED MINES
No mines in this district have been discussed in the historic literature.
Sahinen, Uuno M.
1935 "Mining Districts of Montana", Thesis, Montana School of Mines, Butte.
1974 "Archaeological and Historical Survey in the West Dillon and Tendoy Mountain Planning Units of Beaverhead County, Soutwestern Montana", Bureau of Land Management, Dillon District Office.
Work Projects Administration (WPA) Mineral Resources Survey
Montana Mine Index
, An Alphabetical Index Arranged by Counties, Districts and Mines of Information on Montana Mines from 1867-1940. Montana School of Mines, Butte.