Native American culture is intricately woven into the fabric of the Mojave Desert and it is filled with evidence of their existance in the form of petroglyphs...they are one of the best kept secrets of the desert...
These are links to many of the sites:
Rock art comes in two varieties, petroglyphs and pictographs. The difference between the two types is the manner in which they were made. Petroglyphs were pecked into the surface of the rock. Pictographs were painted on the rock. A coating of dark "desert varnish" on lighter sandstone provides the perfect medium for petroglyphs, which are the most common of the two types of rock art found.
Rock art is both enduring and fragile. It has lasted hundreds of years; yet many panels have been recently defaced by graffiti. Climbing on panels can also damage the art, as can attempts to embellish the petroglyphs for photographic purposes. These practices are destructive and should not be done.