Spring 2016 Western Aleutians Published February 1, 2018 at 1936 × 2592 in Seeking the origins of continents in the western Aleutian island arc ← Previous Next → Postdoc Mattia Pistone waves from the top of a tephra section on Gareloi that he has worked hard to cut. Here you can see dozens of eruptive units. Photos credit: K. Sheppard, E. Cottrell