evidence: The Comoro Islands are a group of volcanic islands in the Indian Ocean, between Madagascar and the African mainland. Three of the islands form the Union of the Comoros, a sovereign nation, while Mayotte belongs to France. Geography [edit]The Comoro Islands are located in the Mozambique Channel to the north-west of Madagascar and facing Mozambique. These volcanic islands, covering a total area of 2034 km2, are as follows: [...] The Glorioso Islands, comprising Grande Glorieuse, Île du Lys and eight little rock islets, were administratively attached to the archipelago before 1975, and, geologically speaking, form a part of the archipelago.