High Quality Content by WIKIPEDIA articles! The wrack zone is part of the shore just above the mean high tide line where kelp is deposited on the sand. This area is identified by the piles of kelp and other debris (e.g. old pier pilings, driftwood), and is often located on a slight "shelf" above the moist sand that slopes down toward the water. A shore or shoreline is the fringe of land at the edge of a large body of water, such as an ocean, sea, or lake. In Physical Oceanography a shore is the wider fringe that is geologically modified by the action of the body of water past and present, while the beach is at the edge of the shore, representing the intertidal zone where there is one.