Grey Eagle Mine, Butte, Butte District (Summit Valley District), Silver Bow Co., Montana, USA
|Latitude & Longitude (WGS84):||46° 0' 57'' North , 112° 35' 55'' West|
|Latitude & Longitude (decimal):||46.01583,-112.59861|
|Köppen climate type:||Dfb : Warm-summer humid continental climate|
REF:Deposit:: MBMG BULL 10, P. 62.
Deposit:: USGS PP 74, PL. X.
Commodities (Major) - Manganese
Development Status: Past Producer
Structure: Boulder Batholith
Host Rock: Aplite
Commodity ListThis is a list of exploitable or exploited mineral commodities recorded at this locality.
Rock Types Recorded
Select Rock List TypeAlphabetical List Tree Diagram
Entries shown in red are rocks recorded for this region.
This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.
Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org
66 - 145 Ma
66 - 145 Ma
|Boulder batholith, alaskite, aplite, and pegmatite and related felsic rocks|
Age: Cretaceous (66 - 145 Ma)
Reference: Zientek, M.L., P.D. Derkey, R.J. Miller, J.D. Causet et al. Spatial Databases for the Geology of the Northern Rocky Mountains - Idaho, Montana, and Washington. U.S. Geological Survey Open-File Report 2005-1235 Version 1.0.