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Meredosia Lake : ウィキペディア英語版 | Meredosia Lake
Meredosia Lake is a riparian lake that forms part of the valley of the Illinois River. It is located in Cass and Morgan Counties, Illinois. Much of the floodplain isthmus between Lake Meredosia and the river is known as Meredosia Island, and much of the quasi-island and associated lakebed are part of the Meredosia National Wildlife Refuge. ==Glacial relic== The drainage, by sudden flood, of a sizable lake of glacial meltwater upon the conclusion of the Wisconsin glacial period left the lower Illinois River valley, including the Meredosia Lake area, as a broad ribbon of relatively impermeable clay and silt bordered by low bluffs. During the post-glacial springtimes, as the climate of Illinois grew warmer, floods caused by snowmelt tended to fill sections of the valley faster than it could be drained during the rest of the year. Eventually the Illinois River became a braided, slow-moving alluvial river bordered by a string of riverside lakes and wetlands. Meredosia Lake is one of these backwater lakes.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Meredosia Lake」の詳細全文を読む
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