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<br />Grams and Schmidt 23 <br /> <br />alternately through reaches of extremely different geomorphic character, both are in a <br />quasi -equilibrium condition. <br />Between 60 and 85 percent of the surface area of the alluvium in the canyon <br />bottom exposed at low flow is contained in the depositional unit called the fan-eddy <br />complex. More specifically, about 42 percent of all fine-grained alluvium in the canyons <br />is stored in eddy bars within fan-eddy complexes. However, most of the total area of <br />alluvium is contained in the meandering reaches where fan-eddy complexes are less <br />important. <br />The fan-eddy complexes of the Green River in the eastern Uinta Mountains are <br />similar with those described on the Colorado River in Grand Canyon by Schmidt and <br />Rubin (1995). Approximately the same areal proportion of fme-grained alluvium is stored <br />as eddy bars within these depositional units in both systems. In the eastern Uinta <br />Mountains, however, there is less distinction between eddy-bar types; separation and <br />reattachment bars are often merged. <br /> <br />Acknowledgments. Research on the Green River in Dinosaur National <br />Monument was made possible through support by the National Park Service. John Pitlick, <br />Darrell Kaufman, and one anonymous reviewer commented on early versions of this <br />:manuscript. Their suggestions were very helpful and are greatly appreciated. <br />