Figure 1. Index map of the Long Island Sound study area (H11999), U.S. Geological Survey (USGS)/Connecticut Department of Environmental Protection (CTDEP) surveys, and National Oceanic and Atmospheric Administration (NOAA) hydrographic surveys. NOAA hydrographic surveys include H11250—Poppe and others (2006c, 2007b); H11255—Poppe and others (2006b); H11252/H11361—Poppe and others (2007a, 2008); H11043—Poppe and others (2004a); H11044—McMullen and others (2005), Poppe and others (2006a); H11045—Beaulieu and others (2005); H11441/H11442/H11224/H11225—Poppe and others (2010a); H11251—Poppe and others (2010b); H11445—McMullen and others (2010); H11446—McMullen and others (2011); and H11997—Poppe and others (2011b). USGS/CTDEP sidescan-sonar surveys include Norwalk—Twichell and others (1997); Milford—Twichell and others (1998); New Haven Harbor and Central Long Island Sound (CLIS) Dumping Grounds—Poppe and others (2001); Roanoke Point—Poppe and others (1999b); Falkner Island—Poppe and others (1999a); Hammonasset—Poppe and others (1997); Niantic Bay—Poppe and others (1998b); New London—Lewis and others (1998), Zajac and others (2000, 2003); Fishers Island Sound—Poppe and others (1998a). End moraines are represented as solid black polygons and are labeled in detail in figure 2. Click here for a larger version of this image.