Lysite, Wyoming - 30x60 Minute USGS Topographic Map Birds great slow-moving rivers and wind-blown

great slow-moving rivers and wind-blown sand dunes

and index maps in Google Earth KMZ

000-scale Geologic map of the Nephi 30' x 60' Quadrangle

The relation of geohydrologic setting to the potential for ground-water contamination in Utah

Lysite, Wyoming - 30x60 Minute USGS Topographic Map Birds great slow-moving rivers and wind-blownThe distinctive characteristic of a topographic map is that the shape of the Earth's surface is shown by contour lines. Contours are imaginary lines that join points of equal elevation on the surface of the land above or below a reference surface, such as mean sea level. Contours make it possible to measure the height of mountains, depths of the ocean bottom, and steepness of slopes. A topographic map shows more than contours. The map also includes