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<br />tj I <br /> <br /> <br />FIGURE 2.3 View upstrcam toward the canyon of the Snake River in Idaho at river mile 462. The surface oflhe ba..lt bench in the <br />foreground, which is about 450 feet above the river (elevation 2,750 feet), was scoured by the Bonneville Flood about 15,000 years <br />ago. The light colored mound in the lee of the bench in the upper left of the photograph is a grass-covered gravel bar deposited by <br />the tlood, whieh demonstrated the preservation potential of paleostage indicators. SOURCE: Reprinted, with penmission, from the <br />Geological Society of America, 1987. @ 1987 'lhe Geological Society of America. <br /> <br />