Cliffs Shaft Mine Museum It continues to be top-of-the-line-preserved examples of underground mining within the Marquette Iron Range. The Cliffs Shaft mine complicated was listed on the National Register of Historic Places in 1992. It is commemorated by a Michigan Historical Marker In 1998, the previous house owners of https://paxton4ebwo.look4blog.com/43306879/geologic-characterization-of-the-black-hills-dam-scottsdale-arizona