Figure 2. 



12 critical areas (4-degree areas) at scale 1 -.250,000 

 (4 miles to one inch). Publication of reports and 

 maps in seven years. 



—In five years complete collection of basic infor- 

 mation to prepare geologic analyses of all our 

 continental margin, including reconnaissance 

 maps, at a scale of 1:1,000,000. Publication of 

 reports and maps in seven years. 



—In 10 years complete field work for the geologic 

 analysis of one half of the continental margins ?♦ a 

 scale of 1:250,000. 



—In 20 years complete geologic mapping of the 

 entire continental margin at a scale of 1:250,000. 



The Geological Survey's programs on the Great 

 Lakes consist mainly of hydrologic studies and 

 geologic mapping in the drainage basins periph- 

 eral to the Lakes and research into the basic 

 hydrodynamics of the Lakes. About half the 

 support for the data-coUection program and the 

 special investigations is furnished by the State or 

 other local govermnents in the eight States sur- 

 rounding the Great Lakes. Research on the Lakes 

 includes projects to describe the circulation pat- 

 terns collected by overflights. 



The Geological Survey is involved in planning 

 International Field Year on the Great Lakes and 

 has prepared plans for work on the water budgets 

 of the Lakes, and on the optical properties of lake 

 water, lake currents, sediment transport and sedi- 

 ment characteristics, additional mapping of lake 

 basin geology, surface chemistry as related to 

 circulation patterns, the synoptic collection of 

 data, and use of mass-transfer techniques to 

 estimate evaporation. 



Current funding by the Geological Survey for 

 coastal and estuarine programs is given in the 

 following table: 



For the future the Geological Survey proposes 

 an investigational and data-collection program in 



'coastal Zone streamflow and water-quality measure- 

 ments are included in a nationwide "land" program and 

 are not shown here. 



HI-85 



