Dr. Paulo Hidalgo College of Arts & Sciences Georgia State University Friday, March 27, 2020 - 3:35pm Geography / Geology 200 A Special Information: Contact Dr. Mattia Pistone for additional information. Colloquium This event has been cancelled. The title of my research presentation is "Magmatic Evolution of the Southern Central American Arc Late Miocene to Present." In this research, I show that in oceanic arcs with moderate crustal thicknesses, variations in magma water content may be the primary variable controlling shifts in magma composition from the typical calc-alkaline series to the characteristic compositional range of Archean continental crust. I will demonstrate during the presentation the importance of amphibole-rich cumulates observed in lavas throughout the region.