Ophir, Colorado - 7.5 Minute Series Topo Map women The principal geologic resources in

The principal geologic resources in the quadrangle are sand and gravel

From the quartz in watches to the limestone in the Great Pyramids

Sublette Range

000 scale State of Colorado Topographic map covers large areas at one inch

and Massacre Lake

Ophir, Colorado - 7.5 Minute Series Topo Map women The principal geologic resources inThe 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