The sandstone is from the Jurassic period and is the remnant of the sand left behind by the wind after inland seas subsided and the land rose. Early man moved into southern Nevada as far again as eleven,000 years ago. The most blatant evidence of occupation is the petroglyphs carved into the rocks by the Basketmaker culture about 2,500 years in the past, adopted later by the Early Pueblo culture. Paiutes have been dwelling on this space in 1865 when Mormons settled at nearby St. Thomas on the south end of the Moapa Valley. Farming, ranching and mining occurred in the area along a slender stretch of water.