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~ the natural ecotone between the juniper, spruce and sage zones and the <br />• more upland areas now near totally covered with scrub oak. The scrub <br />oak has, however, possibly replaced some type of grasslands on the high <br />bluffs of the study area (hbrrell 1977). Additionally, there was a <br />suggestion that relatively ephemeral prehistoric occupations might also <br />be found on low terraces adjacent to streams throughout most of the <br />I upland area (Baker 1984). At the least, however, prehistoric/ <br />aboriginal sites were for the first time bey~~~~~g to erne to light in <br />the North Fork country. In addition to their seeming focus an the <br />ecotone near the mouths of tributary canyons of the North Fbrk, the <br />sites, also, in keeping with known more general patterns of prehistoric <br />occupation, occur on flatter ground with southern exposures near water <br />(Grady 1978, 1960). Archaeologists aP ally recognize such locations <br />as preferred sites of aboriginal occupation. The North Fork country <br />appears to be no exception. Conversely, sites still appear to be rare <br />or absent from the high bluff areas away fran the streams overlooking <br />the North Fork. Imrentory of many spring areas on the high bluffs <br />failed to yield evidence of prehistoric occupation (Baker 1984). <br />• <br />r~ <br />L <br />