Piedmont Glaciers - Malaspina Glacier, AK. Turn on the Problem 27 path to show the approximate boundary between ice from the piedmont glacier and rock and/or ice from a nearby glacier. What is causing the layers to be bent & distorted? O plate tectonic convergence movement along a fault frictional drag as the glacial ice flows past the rocks to the right/east of the Problem 27 path this distortion is only apparent, the materials were actually deposited this way