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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

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Chart showing the relative percentage of sea-floor outcrop for each of the primary seismic stratigraphic units. Qmd, Holocene deepwater marine; Qmn, Holocene nearshore marine; Qfe, Holocene fluvial and estuarine; Qd, undifferentiated Pleistocene glacial drift; Pz(?)/Tcp(?)/Qt(?), undifferentiated Paleozoic bedrock, late Cretaceous to Tertiary coastal plain sediments, or Pleistocene glacial tills; %, percent.

Figure 27. Chart showing the relative percentage of sea-floor outcrop for each of the primary seismic stratigraphic units. Qmd, Holocene deepwater marine; Qmn, Holocene nearshore marine; Qfe, Holocene fluvial and estuarine; Qd, undifferentiated Pleistocene glacial drift; Pz(?)/Tcp(?)/Qt(?), undifferentiated Paleozoic bedrock, late Cretaceous to Tertiary coastal plain sediments, or Pleistocene glacial tills; %, percent.

 


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