Catálogo de aparatos volcánicos de la parte centro-occidental del Cinturón Volcánico Mexicano

Abstract

This work describes a catalog of locations and types of 3,225 volcanic structures in an area of - 141,000 km2, in the westcentral Mexican Volcanic Belt. Hills (cerros) are the most common structures (-73%) in this area. Most volcanic edifices (-60%) are of mafic composition, mostly basalts. Most (-80%) are at an elevation of 2,000 to 3,000 m. The highest concentrations of volcanic centers are found west of Mexico City and in north-western Michoacan State (81- 120 structures / 1,000 km2 . There is one area with o ver 120 structures per 1,000 km2 • The distance of the volcanic front from the Middle-America Trench (MAT) ranges between - 100 km in the NW to -250 km in the SE. Northern and southern limits of the MVB are given in terms of the last volcanic edifice in the study arca.