Aurora, Utah - 7.5 Minute Series Topo Map Roadside History Books plus profiles of 24 of

plus profiles of 24 of America's favorite national parks

The Field Guide to Geology

Petroleum Geology of the Brundage Canyon Oil Field

made famous for its spectacular exposures at nearby Bryce Canyon National Park

or petroleum trapping mechanism

Aurora, Utah - 7.5 Minute Series Topo Map Roadside History Books plus profiles of 24 ofThe 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