The Superior Shoal is a geologic shoal of approximately 20 square miles (52 km2) located 50 miles (80 km) north of Copper Harbor, Michigan in the middle of Lake Superior whose highest point lies only 21 feet (6.4 m) below the lake's surface. The shoal is a volcanic hump in an otherwise deep part of the lake, and though fishermen had known of its existence for generations it was only officially charted in 1929. It has been theorized that the World War I Inkerman and Cerisoles Minesweepers, which disappeared during their maiden voyage on Lake Superior in November of 1918, may have run aground on this shoal and some have theorized that it may have been to blame for the November 10, 1975 sinking of the SS Edmund Fitzgerald, and the November 21, 1902 disappearance of the SS Bannockburn, the "Flying Dutchman of the Great Lakes", as well. It is one of the known off-shore spawning and foraging habitats for the juvenile lean lake trout.
- Marshall, James R. (2005). Shipwrecks of Lake Superior. Lake Superior Port Cities. p. 48. ISBN 9780942235678.
- Bourrie, Mark (2005). Many a midnight ship: true stories of Great Lakes shipwrecks. University of Michigan. p. 193. ISBN 9780472031368. Retrieved 30 October 2011.
- Op. Cit. Bourrie 2005, p. 192
- Stonehouse, Frederick (2006) . The Wreck of the Edmund Fitzgerald (6th ed.). Gwinn, Michigan: Avery Color Studios. ISBN 1-892384-33-7.
- Horns, William H. (2003). Fish-community objectives for Lake Superior. p. 35.
- United States (1921). Great Lakes pilot: including north channel, Lake Michigan, and Lake Superior. Lake St. Clair, St. Clair River, Lake Huron, Georgian Bay, Volume 1 (Second ed.). Hydrographic Office, US Navy. p. 249.