 Flood basalts that ring Madagascar include the Mahajanga lavas (87.6 to 88.5 million years in age), the Toliara lavas and Ejeda-Bekily dike swarm (84.5-84.8 million years old), and the Androy lava flow (84.4 million years in age).These igneous rocks were emplaced during the interval when India and Madagascar were together (91 million years ago), and when apart (84 million years ago).More recent volcanic activity includes the formation of the Ankaratra Massif over the past 5 million years, and Montagne d'Ambre, which erupted from 50 to 2 million years ago.