Anna-Marie’s research concerns degassing and eruption dynamics of several Ecuadorean volcanoes:  Quilotoa, Tungurahua, Cotopaxi.  Of these Cotopaxi and Tungurahua have been recently active and thus provide excellent natural laboratories of how degassing relates to eruption styles and mechanisms.  Quilotoa volcano, while not currently active, produced a large eruption (~VEI 6) that built a caldera in 1280 AD.  Anna-Marie is sleuthing how this event may have contributed considerable sulfur to the atmosphere by micro-analyzing glass inclusions and performing mass balance calculations.