Glacial River Warren
...that the valleys of the Minnesota and Upper Mississippi Rivers were carved by Glacial River Warren, an enormous river which drained Glacial Lake Agassiz in central North America?
...that the valleys of the <a href="./Minnesota_River" id="mwDjg" rel="mw:WikiLink" title="Minnesota River">Minnesota</a> and Upper <a href="./Mississippi_River" id="mwDjk" rel="mw:WikiLink" title="Mississippi River">Mississippi Rivers</a> were carved by <b id="mwDjo"><a href="./Glacial_River_Warren" id="mwDjs" rel="mw:WikiLink" title="Glacial River Warren">Glacial River Warren</a></b>, an enormous river which drained <a class="mw-redirect" href="./Glacial_Lake_Agassiz" id="mwDjw" rel="mw:WikiLink" title="Glacial Lake Agassiz">Glacial Lake Agassiz</a> in central <a href="./North_America" id="mwDj0" rel="mw:WikiLink" title="North America">North America</a>?