How did volcanic activity create the Comoro Islands?

The Comoro Islands were formed through volcanic activity, which caused the islands to emerge from the floor of the Indian Ocean.12

The archipelago is characterized by its volcanic origins, with the landscape across the islands featuring remnants of this geological history. Some coastal areas are marked by the dark, rugged remains of recent lava flows, while other regions are covered in smoothly rounded rocks that serve as eroded reminders of ancient volcanic activity.2

The islands vary in their current volcanic status. For example, Grande Comore is home to Mount Karthala, an active volcano that serves as the country’s highest point and has erupted more than a dozen times in the last two centuries. In contrast, Mayotte is considered the oldest of the four main islands in the group.2