The Wisconsin Geological and Natural History Survey (WGNHS) has been working to serve Wisconsin for over 100 years. Part of University of Wisconsin-Extension, we provide objective scientific information about the geology, mineral resources, and water resources of Wisconsin.
Galena cluster showing cube and octahedron forms, on marcasite and sphalerite. Shullsburg, Lafayette County, WI. Cluster about 10 cm. across. U.W. -Madison Geology Museum specimen. (Photo by Pete Rodewald.)