Native Americans passed through Grass Canyon thousands of years ago and left their marks on the basalt. I am not sure why they picked these rocks, though. There are plenty of other surfaces around that don't have anything on them. But this spot where a basalt butte meets the wash is covered with petroglyphs, probably over 70 of them pecked into the west-facing cliff and scattered across the boulders at its base.
The designs are mostly abstract. Curving lines, circles, and geometric patterns dominate, but with fewer bighorn sheep and human figures than at other East Mojave sites. The site reminds me of Lanfair Buttes. Heavy patination on the rock surfaces suggests these petroglyphs are among the older rock art in the region, likely thousands of years old and dating to what archaeologists call the Western Archaic tradition.
