This map shows the surrounding area in shaded relief and the lake with bathymetric contour intervals of 100 feet. Page 2 of the set shows several selected perspective views giving a person the ability to explore the many canyons and crags of the lake's floor. A geologic map uses a combination of lines, symbols, and colors to show the composition and structure of earth materials and their distribution across and beneath the Earth's surface. They generally show bedrock formations like granite or limestone, surficial units such as sediment deposited by glaciers or rivers, and structures like folds and faults. Geologic maps can be used to identify geologic hazards, locate natural resources, and facilitate land-use planning.
Geologic maps are available for selected states only.