Politics of Spain "Cortes Generales" are dissolved, and new elections are called. The upper chamber is the Senate. It is nominally the chamber of territorial representation. Four senators are elected for each province, with the exception of the insular provinces, in which the number of senator varies: three senators are elected for each of the three major islands — Gran Canaria, Mallorca and Tenerife — and one senator for Ibiza-Formentera, Menorca, Fuerteventura, La Gomera, El Hierro, Lanzarote and La Palma. The autonomous cities of Ceuta and Melilla each elect two senators. In addition, the legislative assembly of each autonomous community designates one senator,
Canary Islands third tallest volcano on Earth on a volcanic ocean island. All the islands except La Gomera have been active in the last million years; four of them (Lanzarote, Tenerife, La Palma and El Hierro) have historical records of eruptions since European discovery. The islands rise from Jurassic oceanic crust associated with the opening of the Atlantic. Underwater magmatism commenced during the Cretaceous, and reached the ocean's surface during the Miocene. The islands are considered as a distinct physiographic section of the Atlas Mountains province, which in turn is part of the larger African Alpine System division. In the summer of