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The Dakotas are both subject to potential override, where the land to the west is pushed eastward during rapid subducting of the Pacific plate under the North American plate. This has somewhat unpredictable results, as until the plates are put to the test, just what areas will break and crumble is not known. The pressure is relative, in that it is not how much pressure exists at any one spot, but whether a nearby area has broken and is on the move. Land, as water, takes the path of least resistance. Thus, should the land to the west break and start sliding over the plains, land under pressure to move, to crumble and push out of the way, to the north or south of this point could move sideways to take advantage of the pressure vent. An additional worry in flat land is the very real possibility of flooding, with no safe place above the flood. As was noted during a recent spring melt in the Dakotas, flood waters on flat land produces a huge lake, which can shock residents not accustomed to thinking of themselves as vulnerable in this way. During the torrential rains that accompany the shift, such floods are a given.

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