AbstractThe Los Ajaches area, Lanzarote, Canary Islands consists of a Tertiary volcanic series overlain by Quaternary lava areas. A trachyte outcrop, the only acid volcanic rock on the island, was relocated and mapped during a survey in 1963. Erosion stages at heights of 460, 400, 300, 190 and 100 m, occur in the eastern highlands. The coastal plain has a remarkable raised beach succession at heights of 55,35,25,15,6. and 1 m. This chronological sequence enables a new dating of the Quaternary vulcanism. Certain observations are also made on landform development and correlation with other areas.