petroglyphs, nevada

3000 america american ancient archeology architecture art beautiful brown carving cave civilization cliff culture dead desert desolate drawing drawings dry etching ethnic fire formations geological geology graffiti graphics heat hills historic hot humans images indian indians landscape mohave mojave native natural nature nevada outdoor paintings parched park past peak people petroglyphs prehistoric preserve primitive protected red rock ruins sandstone scenic scorched shelf southwest state steep stone summer symbols terrain the traditional tribal uninhabited valley wall west western wild wilderness