Emplacement of the final lava dome of the 2009 eruption of Redoubt Volcano, Alaska

► A detailed study of the emplacement of the final 2009 lava dome on Redoubt Volcano ► Growth changed from effusion of blocky lava to injection beneath a fracturing/annealing crust, to exogenous growth. ► Exogenous growth produced highly vesicular (55-66%) lava at the dome apex. ► Dome stability was likely due to vent location and size, and the ability of the dome to reach magmastatic pressures.