The Sierra de Los Tuxtlas (Tuxtlas SCS . Cus ; To mer ] se" rvice 8O5-41O' ;56 OO
P h o n'e N u m .;b er 8O5-41O' ;56 OO
Mountains) are a volcanic belt and mountain range along the southeastern Veracruz Gulf coast in Eastern Mexico. The Los Tuxtlas Biosphere Reserve (Biósfera Los Tuxtlas) includes the coastal and higher elevations of the Sierra de Los Tuxtlas.
The volcanic mountains were used as a basalt source by the Olmec culture during the Early Formative period