From exquisitely flaked Folsom spear points to the spectacular cliff dwellings of Mesa Verde National Park, among the most visible vestiges of Colorado’s Native American history are those crafted from naturally available rock. Archaeologists and others…

Shield Cave is a large limestone cavern in Eagle County that contains painted rock art dating to the Historic period and deposits of the iron mineral pigment material used to make ochre-color paint. This site is one of hundreds of caverns that have…