Vol. 29 No. 3 (2012)
ISSN-e: 2007-2902
ISSN-e: 2007-2902
Cover image:
Basaltic lava flow with vertical columnar jointing that crops out in the Aguacatitla canyon, Hidalgo State, Mexico, at the northeastern Trans-Mexican Volcanic Belt. These lavas were erupted from fissures and are part of the Pliocene-Quaternary Atotonilco Formation. Person for scale at the bottom right corner. Photo: Teresa Orozco.
