A sediment chute with a rock wedged in it. The finer sediment appears to bedammed behind the rock. The white trail seems to end at the sediment androck as well.
4/9/2019 2:26:25 PM
Date: 20130809T150401Z
Credit: NOAA OKEANOS Explorer Program , 2013 Northeast U. S. Canyons Expedition
Location: Heezen Canyon, southwestern wall, 924-742m