Red Ridge, Utah - 7.5 Minute Series Topo Map 250k Geologic Maps Edward Abbey

Edward Abbey

From the first Americans through mountain men

Delve into the heart of Northern California and pinpoint iconic cities like Sacramento

wondrous canyon walls of cobblestone and limestone overhang at dizzying angles

Red Ridge, Utah - 7.5 Minute Series Topo Map 250k Geologic Maps Edward AbbeyThe 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