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crossings (e.g. through valleys and wind gaps) on the Boxelder Creek-Little Missouri River divide (in eastern Montana and west of the Little Missouri River) and suggests deep regional erosion occurred as the north oriented Little Missouri River valley eroded headward into and across the region...
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获取原文 摘要 This report presents the results of a shoreline survey of Lewis and Clark Lake, Nebraska and South Dakota. The survey, performed by crews from Wichita State University and the University of Iowa, is the first to provide complete coverage of the shoreline of this lake. The report...
On the 2,315-mile journey from its headwaters at Three Forks, Montana, to its confluence with the Mississippi near St. Louis, it covers seven states and drains nearly a sixth of the continental United States.You can get a taste of the river's history on a three-to seven-day trip ...