Recent explosive volcanism at the eastern Trans-Mexican Volcanic Belt

The eastern Trans-Mexican Volcanic Belt is characterized by a diversity of volcanoes that are related to different processes and eruptive styles. The spectacular exposures of late Pleistocene and Holocene volcanism provide a unique opportunity to explore a variety of volcanic features and deposits that may be relevant for volcanic hazard assessments within the area. This three-day fi eld guide describes selected representative examples of the regional volcanism showing volcanic features including thick pyroclastic successions derived from the explosive activity of Los Humeros caldera volcano, caldera-rim effusions, alternating explosive and effusive activity of a vitrophyric rhyolite dome (Cerro Pizarro), and the eruptive activity of two compositionally contrasting maar volcanoes: Atexcac, a classic basaltic maar and Cerro Pinto, a rhyolitic tuff ring–dome complex. *gerardoc@dragon.geociencias.unam.mx Carrasco-Núñez, G., Dávila-Harris, P., Riggs, N.R., Ort, M.H., Zimmer, B.W., Willcox, C.P., and Branney, M.J., 2012, Recent explosive volcanism at the eastern Trans-Mexican Volcanic Belt, in Aranda-Gómez, J.J., Tolson, G., and Molina-Garza, R.S., eds., The Southern Cordillera and Beyond: Geological Society of America Field Guide 25, p. 83–113, doi:10.1130/2012.0025(05). For permission to copy, contact editing@geosociety.org. ©2012 The Geological Society of America. All rights reserved. 84 Carrasco-Núñez et al.