|
USA | |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| Frank Karasti |
| Wolff R. G., Huber N. K., (1973 The Copper Harbor Conglomerate (Middle Keweenawan) on Isle Royale, Michigan and its Regional Implications, USGS Paper 754-B |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| Bornhorst T. J., Rose W. I., (1994) Self-guided geological field trip to the Keweenaw Peninsula, Michigan. |
| White, Walter S, (1972), The Base of the Upper Keweenawan, Michigan and Wisconsin, Geological Survey Bulletin 1354-f. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |