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<br /> <br /> <br />(Modified from Hombllnond Rl9by, 1968) <br /> <br />EX~LA,.,~I!()~~~. <br />I TRIBUTARY DEBRIS FAN <br />2 RAPID CONTROLLED BY LARGE IMMOBILE BOULDERS <br />" II.. ") <br />3 DEBRIS BAR (synonymous with islol'\d or rock 90rden <br />4 RIFFLE OR RAPID CAUSED BY DEBRIS BAR <br /> <br />Figure 2.--Geomorphic features of a typical rapid controlled <br />by debris flows on the Colorado River. <br /> <br />-6. <br />