The interpretation of surface artifact scatters presents a challenge to all archaeologists, including those •who work in the deserts of the American West. In some circumstances, a sufficiently dense and diverse artifact assemblage can indicate the presence of buried pit houses or other evidence of habitation (Czaplicki and Ravesloot 1989). At the opposite extreme, there are artifact scatters of low density and diversity that are often assumed to be exclusively surface manifestations, unlikely to be accompanied by significant subsurface remains. This is especially true when the artifacts are scattered on top of, or are incorporated in, desert pavement.