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Place
- About 15 feet from the Pictured Rocks escarpment edge.1
- About Alma1
- Alger2
- Bennington1
- Cheboygan1
- East Dorset (Town of Dorset)1
- Emmet2
- Gratiot1
- Greenstone Ridge within 2 mi. of Windigo, Isle Royale National Park.1
- Isle Royale National Park. Above Tobin Creek.1
- Keweenaw4
- Leelanau2
- Mackinac1
- Mackinac Island.1
- McCargo Cove vicinity -- pond below Minong Mine, Isle Royale National Park.1
- Michigan17
- Montmorency1
- NW corner Sugar Loaf Lake.1
- Near Cliff Mine site.1
- Near Grand Lake.1