|
Contours are close together when the land surface is steep, far apart when it is gradual. A vertical cliff is indi- cated by many contours converging to form a single line. Contours cross only when they represent an overhanging cliff. It is rare to find maps which are of such scale and accuracy that they will show the fine detail of an overhang. Adequate knowledge of contour topography is difficult to obtain from any manual. It is suggested that the skier first become familiar with the United States Geological Survey map of his home locality or usual skiing area. Recommended for further study are: Yosemite Valley Special Sheet (for detail of cliff sculpture), Mount Rainer National Park (for glaciers), and the Wabuska or Carson Sink sheets of Nevada (for desert forms). |
|||
|
