Ross Ice Shelf
Ross Ice Shelf photo published in National Geographic Magazine, December 2009. The Ross Ice Shelf in Antarctica is a gigantic floating glacier the size of Texas or France. Visitors explore a deep blue crevasse near the edge of the shelf, which delineates a large flake of ice ready to fall into the Ross Sea. The shelf rises more than 100 feet above the sea, but extends to depths 1000 feet below the sea surface.