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Blackstone Mine, Shullsburg area, Upper Mississippi Valley District, Lafayette Co., Wisconsin, USA

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Latitude & Longitude (WGS84): 42° 32' 1'' North , 90° 19' 50'' West
Latitude & Longitude (decimal): 42.53383,-90.33080
Köppen climate type:Dfb : Warm-summer humid continental climate


This large, rich zinc mine worked first between 1916 and 1926. The mine was later worked from the 1950's into the 1970's. Ore was mostly in pitch and flat structures in the Ordovician carbonate rocks of the Platteville, Decorah and Galena Formations.


Mineral List


4 valid minerals.

Regional Geology

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

Ordovician
443.8 - 485.4 Ma



ID: 2922437
Sinnipee Group

Age: Ordovician (443.8 - 485.4 Ma)

Stratigraphic Name: Galena Formation; Decorah Formation; Platteville Formation

Description: Dolomite with some limestone and shale; includes Galena, Decorah, and Platteville Formations

Lithology: Major:{dolostone}, Minor:{limestone,shale}

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. [133]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License



This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

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LaBerge, G. (1984), The geologic history of Wisconsin: Rocks and Minerals: 59(2): 60-73.
Heyl, A., Agnew, A., Lyons, E. & Behre, C. Jr. (1959), The geology of Upper Mississippi Valley Zinc-Lead District: U.S. Geological Survey Professional Paper 309; 206, 209-210 and 227.

Mineral and/or Locality  
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