The ice age in North America and its bearing upon the antiquity of man5th edwith many new maps and illus., enland rewritten to incorporate the facts that bring it up to date, with chapters on Lake Agassiz and the Probable cause of glaciation . ^ ^, *-a 3fc y. THE GLACIAL LAKE AGASSIZ By Warren Upham, , St. Paul, Minn. As soon as the departing ice-sheet, which had envelopedthe northern United States and British America during theglacial period, in its final melting off the land from south tonorth, receded beyond the water-shed dividing the basin ofthe Minnesota River from that of the Red Ri
The ice age in North America and its bearing upon the antiquity of man5th edwith many new maps and illus., enland rewritten to incorporate the facts that bring it up to date, with chapters on Lake Agassiz and the Probable cause of glaciation . ^ ^, *-a 3fc y. THE GLACIAL LAKE AGASSIZ By Warren Upham, , St. Paul, Minn. As soon as the departing ice-sheet, which had envelopedthe northern United States and British America during theglacial period, in its final melting off the land from south tonorth, receded beyond the water-shed dividing the basin ofthe Minnesota River from that of the Red River of the North,a lake, fed by the glacial melting, stood at the foot of the ice-fields, and extended northward as they withdrew along thevalleys of the Red River to Lake Winnipeg, filling this valleyand its branches to the heights of the lowest points overwhich an outlet could be found. Until the ice-barrier wasmelted away on the area now crossed by the Nelson River,thereby gradually draining this glacial lake, its outlet wasalong the present course of the Minnesota River. At firstits overflow was upon the nearly level undulating surfaceof the drift, 1,050 to 1,125 feet above the sea, at the westside of Traverse and Big Stone counties, Minnesota; bu
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Keywords: ., bookauthoruphamwarren18501934, bookcentury1900, bookdecade1910
