Andesitic-dacitic volcanism at the Sierra Chichinautzin Volcanic Field, and its influence in the construction of the Xochicalco pre Hispanic site, central Mexico
Fieldtrip guide
Monogenetic volcanic fields in Mexico are widely distributed, from northwestern Mexico to central Mexico and eastern Mexico. Many of these fields are in the Trans-Mexican Volcanic Belt province, an active continental volcanic arc related to the subduction of the Cocos and Rivera plates beneath the North American plate.
The main purpose of this field trip guide is to show outcrops of two examples of monogenetic volcanic activity: 1) a basaltic andesite (Jumento volcano) that represents an initial explosive eruption that shifted into effusive activity and 2) the dacitic Tabaquillo volcano that records effusive activity during which a dome was developed, and lava flows with pronounced fronts were emplaced.
The second goal of this field trip is to discuss the influence of volcanic activity in the Xochicalco archaeological site, a pre-Hispanic settlement (700-900 AD) located ~34 km south of the Tabaquillo volcano.