Figure 4. Maps showing the 1- and 3-meter (m) contours of sediment thickness from the 1996–97 and 2011 surveys offshore of Fire Island, New York, of the A, shoreface-attached sand ridges and B, area of accretion on the lower shoreface overlain on the 2011 modern sand thickness (Schwab, Denny, and Baldwin, 2014). Yellow lines illustrate the southwest migration of contours. See figure 3A for locations.