However, some lobes are not continuous and break apart to form pillow sacks, thus adding rubble to the flank of the volcano. The active front of a lava delta is called a bench. Like the delta, the bench is built on rubble. Photograph by Christina Heliker, U.S. Geological Survey, August 25, 1994. A visitor, standing on the bench at the time of the collapse, disappeared into the ocean.
Dark areas are black sand.