"The islands of Africa can be subdivided into Indian Ocean Islands and Atlantic Ocean Islands.
All of the islands of Africa, except for Madagascar, are classified as small islands under the UNESCO classification system for all islands under 2,000 square kilometres. Madagascar, in contrast, at 587,041 square kilometres is the fourth-largest island in the world.
The islands of Africa with the exception of Madagascar are almost all volcanic in origin, high in structure, with low coral elevation, with some surface water resources and undergo variable weather conditions, with occasional destructive tropical cyclones." --Wikipedia
