Distinctly different lithologies are manifested by the layer of white seeminglydenser and harder layer lying between layers of bio-eroded chalk layers.
4/9/2019 2:26:08 PM
Date: 20130718T151417Z
Credit: NOAA OKEANOS Explorer Program , 2013 Northeast U. S. Canyons Expedition
Location: Alvin Canyon, east wall 1088-1010m