To fully understand prehistoric land use patterns, we must define how prehistoric peoples used particular places on the landscape over longer periods of time. Factors influencing the multi-year use of particular places include human modifications to the landscape as a result of previous occupations. The construction of relatively elaborate and costly facilities for anticipated reuse is one type of modification associated with the repeated occupation of specific locations. Slab-lined cylindrical basins of southwest Wyoming are an example of that type of facility. The archaeological evidence indicates that prehistoric hunter-gatherers repeatedly reused some of these basins on a periodic basis over periods as long as 500 years and reoccupied some locales containing such facilities over a period of more than 2,000 years. The construction of such facilities and the repeated occupation of those locales were apparently related to the procurement and processing of a stable, predictable resource. Biscuitroot was the most likely target resource procured and processed at these locales.

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