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 . ier is still receding. Wood Glacier is nolonger tidal and only a small part of Geikie Glacier ice frontis exposed to salt water. Geikie Glacier has receded about5,000 feet during the past fourteen years. On the whole, recession has been the rule for the glaciers *of Glacier Bay. Those glaciers have receded most whose frontshave, on recession, increased a
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 . ier is still receding. Wood Glacier is nolonger tidal and only a small part of Geikie Glacier ice frontis exposed to salt water. Geikie Glacier has receded about5,000 feet during the past fourteen years. On the whole, recession has been the rule for the glaciers *of Glacier Bay. Those glaciers have receded most whose frontshave, on recession, increased appreciably in length. In thepast fourteen years the combined ice front of all the glaciersexposed to the tide water has increased from 17,000 feet toover 40,000 feet and the amount of recession has in that timealone equalled that of the previous twenty years. To the west of Glacier Bay, Brady Glacier in Taylor Bayhas receded considerably. In Lituya Bay, the glacier atthe northwestern end of the bay has advanced about one-halfmile since 1894; the central and southeastern glaciers haveapparently remained unchanged although the latter may haveadvanced slightlj.* *H. F. Reid: Variation of Glaciers, xii, Journal of Geology, xvi, pp. 52, Il <TE V—Mulr fJlaohr Id 1«W CHAPTER IV. THE GLACIERS OF GREENLAND. The continental proportions of Greenland, and the ex-tent to which its area is covered by glacial ice, make it byfar the most important accessible field for glacial observa-tions. The total area of Greenland can not be less than 500,-000 square miles—eqnal in extent to the portion of theUnited States east of the Mississippi and north of the is now pretty evident that the whole of this area, excepta narrow border about the southern end, is covered by onecontinuous sheet of moving ice, pressing outward on everyside toward the open water of the surrounding seas. For a long time it was the belief of many that a largeregion in the interior of Greenland was free from i
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