Menorca is made up of a great variety of rocks of different ages. Its origin is from the Palaeozoic era, specifically some 410 million years ago, and it is here where the genesis of the most primitive materials of the island began, particularly in the municipality of Alaior located within the Migjorn or southern region. The coastal and central area of the municipal district is formed by different materials from the Miocene era, although in the ravine areas there are materials from the Quaternary era. This makes the municipality a geologically interesting and diverse place in which to observe the terrain.