Léoube islet is of continental origin like the other islands and islets of Provence, recently isolated because still attached to the mainland during the Würm final marine regression. A true island-continent yo-yo indeed occurred several times during the Pleistocene (from 2.6 million to 11,700 years ago), lowering or rising the sea from 328 to 492 ft (100 to 150 m) below the current level, so much so that the Provençal islands have been continental longer than insular. The Hyères islands, in the area of which Léoube islet extends, have become insular again 11,000 to 12,000 years ago with the upwelling of the waters of the Versilian Holocene marine transgression.