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• assessment of site probability. Ridgetops were surveyed <br />by two to four archaeologists walking five to 20 meters <br />apart in a parallel zigzag fashion. In heavy thickets of <br />scrub oak, which occurred frequently on ridgetops, the <br />spacing and zigzag pattern depended in large degree upon <br />game trails, as the thickets are virtually impenetrable <br />in the absence of such trails. Some transects were partially <br />completed on hands and knees. <br />Drainage bottoms, fans, benches, and sage flats were <br />surveyed in a similar manner, generally without the inter- <br />ference of dense scrub oak thickets. Steep slopes were <br />transected with spacing up to 35 meters apart, since site <br />probability is very low, and vegetation is very thick. <br />However, rock exposures on steep slopes were given very <br />close attention, because of the probability of rockart .. <br />and rock shelter sites. Arroyos in relatively flat areas <br />and in some very steep situations were walked by at least <br />• one archaeologist and often by two archaeologists. Aspen <br />groves were given a close examination, due to the proba- <br />bility of historic carvings. <br />An aboriginal site was defined generally as five or <br />more artifacts within 100 meters. This was not an iron- <br />clad definition, however. If a valid reason could be <br />discovered, such as the possibility of rapid alluviation, <br />a lower density would have been accepted. <br />Sites were recorded on relevant State of Colorado <br />forms. Maps were drawn using a Brunton compass, a 30-meter <br />tape (often used as a baseline), a six-meter tape, and <br />pace. Color and black and white photographs were taken. <br />Diagnostic and formal tools were collected from 5RT139. <br />No other sites produced diagnostic material. <br />• <br />23 <br />