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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />r <br /> <br /> <br />40 <br /> <br />FB= Ilood bar wi >12" boulders w/lichen <br /> <br />..- <br />C1l <br />C1l <br />.... <br /> <br />-bedrock <br /> <br />wall~ <br /> <br /> <br />ftilt <br /> <br />30 <br /> <br />""- <br /> <br />c <br />o <br /> <br />colluvium <br /> <br />~ <br /> <br />PSI rang <br /> <br />...~....... ........... <br /> <br />thick colluvium I <br />(grey, silly 10~ <br /> <br />97 HWM 5-0.008 <br />n-0.035 <br /> <br />20 <br /> <br /> <br />-. .... ........".......,.. <br /> <br />..- <br />ro <br />> <br />C1l <br />W <br /> <br />10 <br /> <br />o <br />o 50 100150200250300350400 <br />Stationing, feet <br /> <br />3. Cherry Creek IJpstream from Castlewood Canyon about 6 miles south of Franktown: a.) <br />Photograph showing upstream view of paleoflood reach with left bank bedrock outcrop defining <br />the cross section shown in fig. 3b; 3b.) graph of channel cross section. The highest paleostage <br />indicator is constrained by uneroded, old colluvium, and a flood-deposited boulder bar (-250 x <br />100 x >10 feet) with surface boulders up to 2.5 feet in diameter. Boulders up to 10 feet in <br />diameter on the floodplain, from rock fall off canyon walls, are available for transport, but <br />flood flow competence has not been sufficient to substantially move these large boulders. The <br />range of peak discharge is 12,400 to 20,000 ft3/S. <br /> <br />.' <br /> <br />