The Valles Caldera consists of a twelve-mile-wide collapsed volcanic crater and more than ten post collapse volcanic domes in New Mexico's Jemez Mountains. In 2000, Congress passed the Valles Caldera Preservation Act, creating a Trust to oversee the protection and development of the Valles Caldera National Preserve.
This book offers a summary of significant geologic events that have taken place in the Valles Caldera area and presents the geology, volcanology and geothermal characteristics of the Caldera and the Jemez volcanic field.