Crescent, Oregon - 30x60 Minute Series Topo Map General Geology Erik Molvar and Tamara Martin

Erik Molvar and Tamara Martin describe the best routes for those who have limited time or abilities

Designed for wilderness enthusiasts of all ages and skill levels

Pages: 105 p

Utah-bred men managed the line

Crescent, Oregon - 30x60 Minute Series Topo Map General Geology Erik Molvar and Tamara MartinThe 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