Salvation Creek, Utah - 7.5 Minute Series Topo Map Tar Sands and Oil Shale and events that helped revolutionize

and events that helped revolutionize transportation and commerce in 19th- and 20th- century America

clear step-by-step photographs of the process

• Trail distance

the availability of water in the relatively dry southwestern corner of the state

easy to read color palette with blue oceans and colorful borders

Salvation Creek, Utah - 7.5 Minute Series Topo Map Tar Sands and Oil Shale and events that helped revolutionizeThe 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