|This Open-File report is a digital geologic map database. This digital map database is compiled from previously published sources combined with some new mapping and modifications in nomenclature. The geologic map database delineates map units that are
|Yerkes, Robert F.
|U.S. Geological Survey Open-File Report 97-163
Geographic features (lake bathymetry, pre-dam topography, sediment thickness) are shown as color-contour map images at an unspecified projection and scale. These map images are rendered in Graphic Interchange Format (GIF).