The formation became known by several names, including Ferdinandea and Graham Island. The island emerged from volcanic activity beneath the Mediterranean Sea. The island consisted largely of volcanic material https://music.amazon.co.uk/podcasts/69d3b9a8-ce50-4beb-8cef-e2712da6057e/episodes/c144c6b4-8f1a-4eae-b07e-c3abc6b75de4/b33website