OFR 2005-1048 Home / Introduction / Geologic Setting / GIS Data Catalog / Bottom Photographs

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U.S. Geological Survey Open-File Report 2005-1048

Geological Interpretation of Bathymetric and Backscatter Imagery of the Sea Floor Off Eastern Cape Cod, Massachusetts


Figure 25

Figure 25: Schematic drawing showing how fine-grained glaciolacustrine units can affect the position of the salt water/freshwater interface in well fields on Cape Cod.

Schematic drawing modified from Masterson (2004) showing how fine-grained glaciolacustrine units can affect the position of the salt water/freshwater interface in well fields on Cape Cod. These units limit recharge causing saltwater intrusion and downconing of surface waters in wells drilled to above the fine-grained units (Well 1), upconing of salt water in wells drilled to below these units (Well 2), and poor flow rate in wells drilled into the glaciolacustrine sediments (Well 3).


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