Figure 1. Location map of the Buzzards Bay study area, Massachusetts. Swath bathymetry, sonar backscatter, and chirp seismic-reflection data were collected in the area inside the red polygon. Dark gray is from a Massachusetts Office of Geographic Information (MassGIS) hillshade relief image of Massachusetts. Light blue lines show drainage modified from drainage of Massachusetts (MassGIS). Medium gray is the hillshade relief map modified from the composite bathymetry of Buzzards Bay (fig. 3). The light gray background indicates areas of ocean and coastal embayments where no hillshade relief image is shown. The Elizabeth Islands chain includes the islands labeled on the map: Nonamesset; Uncatena; Naushon; Pasque; Nashawena; Penikese; and Cuttyhunk.