Blackstone Mine, Shullsburg area, Upper Mississippi Valley District, Lafayette Co., Wisconsin, USA
|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.
4 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
443.8 - 485.4 Ma
Age: Ordovician (443.8 - 485.4 Ma)
Stratigraphic Name: Galena Formation; Decorah Formation; Platteville Formation
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.