ASPS 2002-2003.  The results of the ASPS 2000 reconnaissance survey indicated that the density of artifactual material in the High Desert was both variable and in places extremely high.  Based on this finding, we started a project to systematically survey this area to better understand changing patterns of landscape use during the Paleolithic.  In the winter of 2002-2003, we spent approximately four weeks in the desert doing a combination of systematic survey over large areas and intensive collection of two high density occurrences.  From this work we are now developing models to explain the formation and distribution of materials across this landscape.