Greeley, Colorado - 30x60 Minute Series Topo Map Engineering Geology Mayes and B

Mayes and B

Lower Sego Canyon

Crawford Ranges and Bear Lake Plateau

USGS Bulletin 1135-B Oxidized zinc deposits of the Untied States

Greeley, Colorado - 30x60 Minute Series Topo Map Engineering Geology Mayes and BThe 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