Bullfrog, Utah - 7.5 Minute Series Topo Map Roadside History Books plus over 250 black-and-white illustrations

plus over 250 black-and-white illustrations

and safety tips are included as well

Northern Utah's Wasatch Mountains are popular destinations for outdoor enthusiasts in every season

By: Robert F

and several hundred coal exploration well records

Bullfrog, Utah - 7.5 Minute Series Topo Map Roadside History Books plus over 250 black-and-white illustrationsThe 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