Department Bulletin 1430 
Plate V 
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Erosion of Naked Mountain Slopes 
Fig. 1. — Naked mountains and plains, Apache County, Ariz. 
Erosion of Scantily Protected Mountain Slopes 
Fig. 2. — Gullied and eroded slopes, brush-covered mountains, San Diego County, Calif. 
WHERE EROSION OF SOIL CAN NOT BE PREVENTED 
Typical of much of the country of western Texas, New Mexico, Arizona, and parts of southern 
California. Long periods of drought limit vegetation to a scant herbage and hardy shrubs. 
Consequently much of the surface is exposed. At intervals there are torrential rains, and 
when these occur erosion is disastrous 
