Osceola Mine, Osceola, Houghton Co., Michigan, USA
|Latitude & Longitude (WGS84):||47° 14' North , 88° 27' West|
|Latitude & Longitude (decimal):||47.23333,-88.45000|
|Other regions containing this locality:||Keweenaw Peninsula, Michigan, USA|
|Köppen climate type:||Dfb : Warm-summer humid continental climate|
An underground copper mine consisting of 11 shafts around Calumet. The Osceola Mining Co. organized in 1873 and worked the Calumet Conglomerate. In 1877, the Osceola Amygdaloid was discovered. In 1879, it merged with the Opechee Mining Co. to form the Osceola Consolidated Mining Co. In 1897, the company opened up the Kearsarge Lode by starting the North and South Kearsarge Mines. In 1909, Calumet & Hecla took control of Osceola and later merged it with its operations in 1923. Calumet & Hecla worked the mine until it closed in 1931. In the 1950's, C&H reopened the mine and worked it until the 1968 labor strike, at which time all C&H operations were closed for good. The best mineral hunting is found at Osceola shafts #3 and #4, where copper crystals and wires are found. Osceola #1 and #2 are also great for copper "skulls", silver crystals, and datolite crystals.
Commodity ListThis is a list of exploitable or exploited mineral commodities recorded from this region.
Mineral ListMineral list contains entries from the region specified including sub-localities
20 valid minerals.
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
1000 - 1200 Ma
|Portage Lake Volcanics|
Age: Stenian (1000 - 1200 Ma)
Stratigraphic Name: Portage Lake Volcanics
Comments: This unit is the same as unit Yp on paper map of Sims (1992). Description is taken from that unit description.
Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. 
Localities in this Region
- Houghton Co.