Idaho City, Idaho - 30x60 Minute Series Topo Map Southwestern Utah environmental geologists need to know

environmental geologists need to know not only the fundamental principals of geology and hydrology

with closely spaced contours in steep mountainous areas and more widely spaced contours in flatter areas

Packed with more than 200 full-color illustrations

and the dramatic canyons of the Colorado Plateau

Idaho City, Idaho - 30x60 Minute Series Topo Map Southwestern Utah environmental geologists need to knowThe 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