Commodities
PrimaryGypsum-Anhydrite
Commodity typeN
Deposit
Deposit typeSedimentary
Deposit sizeY
WorkingsUnderground
Orebody formBEDDED
Ore controlGypsum-Bearing Zone Confined To Piper Fm, Which Circles The Dome, Zone Displaced In Eastermost Workings By Large Fault.
Materials
Ore mineralsAnhydrite, Gypsum
Geology
Host rockLimestone · Ellis Group, Piper Formation, Gypsum-Bearing;Ellis Group, Otter Formation, Limestones & Shales;Big Snowy Group, Otter Formation, Limestones & Shales
StructureHanover Laccolithic Domal Structure - All Beds Dip Away From Central Portion Of Uplift
Economic & production
Development statusPast Producer
First production1916
Identification
Deposit ID10071385
MRDS IDW014731
RegionNA
Data scoreB
Coordinates47.12464, -109.55163
References
MILLER, R. N., 1959, GEOLOGY - SOUTH MOCCASIN MTS., FERGUS COUNTY, MONTANA, MT. BUREAU MINES & GEOLOGY MEMOIR 37.PERRY, E. S., 1949 , GYPSUM, LIME & LIMESTONE IN MONTANA, MT. BUREAU MINES & GEOLOGY MEMOIR 29 .ROBERTSON, A. F., 1950, MINES & MINERAL DEPOSITS - FERGUS COUNTY, U. S. BUREAU MINES INF. CIRC. 7544.MILLER, 1959, M.B.M.G. MEMOIR 37.