"Review of ethnographic and recent archaeological studies suggest that past human use of high elevation subalpine and alpine environments in northwestern North America was more intense than is currently believed. Archaeological survey high in coastal and interior mountain ranges resulted in locating 21 archaeological sites ranging in age between 7,500-1,500 BP. Lithic analysis of material from these sties indicates that technological strategies used at high elevations were affected by raw material availability, type and group mobility. the technological orientations of high elevation sites in coastal areas differed from those in the interior." taken from the provided abstract, p. iii.