During the Last Ice Age, the sea level dropped to about 130 meters below its current level, its islands were slightly larger with the Northwest Island, present day Santo Antão was a kilometer northwest of the island, Boa Vista and Maio were one single island, and there was another island named Nola (Ilha da Nola) northwest of Santo Antão that was about 80–90 metres tall. Before the end of the Ice Age, the Eastern Island (Ilha Occidental) split into three islands, one became submerged and is now the João Valente Reef, the Canal de São Vicente were widened to 12 km distant from Santo Antão, Nola Island submerged and again became a seamount and the east of the Northwest Island were broken up into São Vicente, the smaller Santa Luzia and the two islets of Branco and Raso.