U.S. Geological Survey Open-File Report 2012-1157
Shallow Geology, Seafloor Texture, and Physiographic Zones of the Inner Continental Shelf from Nahant to Northern Cape Cod Bay, Massachusetts
Figure 17. The distribution of physiographic zones within the study area from Nahant to Northern Cape Cod Bay. The physiographic zone classification is based on Kelley and others (1996), and the zones are delineated based on sea-floor morphology and the dominant texture of surficial material.