Abstract
Analysis of debitage from Wetherill Mesa in Mesa Verde National Park indicates dramatic changes in toolstone procurement patterns through time. For much of the early occupation of Wetherill Mesa, locally available igneous and indurated shale toolstones were the primary resources utilized. During the Pueblo II period, however, there was a shift to the use of Brushy Basin chert, which outcrops approximately 20 km away. By the end of the Pueblo II period, there is another change in procurement. Silicified mudstones from the Burro Canyon and Morrison formations, from approximately 10 km away, were used. These changes in toolstone provide important clues about the changing social landscape in the central Mesa Verde region over time.
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