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 . rdor Antelope moraine, it had farther retreated to Forest Cityand Pilot Mound in Hancock county, Iowa. The fourth orKiester moraine was formed when the southern extremity ofthe ice-lobe had i-etreated across the south line of Minnesotaand halted a few miles from it in Freeborn and Faribaultcounties. The fifth or Elysian moraine, crossing southern LeSueur
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 . rdor Antelope moraine, it had farther retreated to Forest Cityand Pilot Mound in Hancock county, Iowa. The fourth orKiester moraine was formed when the southern extremity ofthe ice-lobe had i-etreated across the south line of Minnesotaand halted a few miles from it in Freeborn and Faribaultcounties. The fifth or Elysian moraine, crossing southern LeSueur county. Minnesota, marks the next halting-place of theice. At the time of formation of the fifth moraine, the south 662 THE ICE AGE IN NORTH AMERICA. end of the ice-lobe had been melted back a hundred and eio^htymiles from its farthest extent, and its southwest side, which atfirst rested on the crest of the Coteau des Prairies, had retiredthirty to fifty miles to the east side of Big Stone Lake and theeast part of Yellow Medicine county. During its next stage ofretreat this ice-lobe was melted away from the whole of LeSueur county, and its southeast extremity was withdrawn toWaconia, in Carver county, where it again halted forming its. Fig. 181.—Map tihowiiin: the f^tages of recession of the ice in Jlinnesota as described in the test. (Ipham.) sixth or Waconia moraine. The seventh or Dovre morainemarks a pause in its recession when its southeast end rested on MAN AND THE GLACIAL PERIOD. 663 Kandiyohi county. Probably nearly all of the southern half ofMinnesota was at this time divested of its ice-mantle, whilenearly all of the northern half was still ice-covered, the glacialboundary across the State passing in an approximately east towest course not far from Little Falls. By its next recessions the ice-border was withdrawn to theeighth or Fergus Falls moraine, and the ninth or Leaf Hillsmoraine. These are merged together in the prominent accu-mulations of the Leaf Hills, whi
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Keywords: ., bookauthoruphamwarren18501934, bookcentury1900, bookdecade1910
