Cape Lyon is located in the Northwest Territories, Canada within Darnley Bay, 14 miles (23 km) from Clapperton Island. The cape was named in honor of Captain George Francis Lyon, R.N. by John Franklin. The topography presents with gently swelling eminences, covered with a grassy sward, and intersected by several narrow ridges of rocks, rising about 150 feet (46 m). The coast ridges form high cliffs. Clay-slate and limestone lie in nearly horizontal strata beneath them. The view inland terminates with the Melville Range.
- Franklin, John (1828). Narrative of a Second Expedition to the Shores of The Polar Sea in the Years 1825, 1826, and 1827 (Public domain ed.). John Murray. pp. 240–. Retrieved 29 December 2012.