St Joe Baldy, Idaho - 7.5 Minute Series Topo Map Science Projects including ages of surface displacements

including ages of surface displacements and volcanism

car camping

Navigate with confidence through a landscape sculpted by glaciers and time

author of many field guides

You don't have to be an expert to appreciate the beauty of wildflowers

St Joe Baldy, Idaho - 7.5 Minute Series Topo Map Science Projects including ages of surface displacementsThe 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