If you have trouble locating the rock art once you are near the site, don't be discouraged. REMEMBER: Check your mileages. You will develop a sense of which types of rocks and surfaces are appropriate areas to look for petroglyphs and pictographs. Petroglyphs are commonly found on the black or brown surface (called desert varnish) of rock cliffs. The straight, smooth, red sandstone found in the Navajo and Wingate formations is a good area to look for pictographs. As you spot one image, look carefully around the adjoining surface areas. Often there are numerous images at any given site. The main panel might have one or more subpanels nearby. Some of the images may be very faint, having faded or eroded through the years. You will sometimes see one layer of images constructed on top of another.