Geologic Exploration of the Northern Central American Arc : a Transect from the Guatemalan Highland into the Back Arc Rainforests.

Abstract

Guatemala is composed of the Maya and Chortis Blocks, which consist of Proterozoic and Paleozoic basement terranes that have been intruded by subduction-related magmas since the Mesozoic. The modern Central American Arc initiated ~4 Ma and consists of thirty-nine distinct clusters of cones, domes, calderas, and vents with seven main volcanic centers dispersed evenly across the arc. The volcanic and tectonic activity in Guatemala has led to a diverse ecosystem stretching from the volcanic highlands to low tropical rainforests. Volcanic activity has profoundly influenced the Guatemalan culture since the time of the Mayas.