Publication Volume 5

Publication Volume 5

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1911 edition. Excerpt: ...high escarpment is so striking that a line of levels was run from near Gladstone to the top of the terrace and thence north-northeastward to Masonville, south-southwestward for some three miles, and northwestward across the plain to a rising slope beyond the third railroad in the series (see Fig. 39). Cross sections were made to the bay at Furnace Island and at a point some three miles south of Gladstone. The long north-northeast section parallel to the shore is reproduced in Fig. 41. From this profile it appears that the surface of the plain is gently undulating with maximum local variations of only a few feet and that for a distance of about three miles south of Furnace Island the plain slopes southward at the rate of about 3 feet per mile ranging from 139 feet of elevation on the south to 117 feet on the north. Goldthwait's earlier studies on the southern peninsula of Michigan and in the vicinity of Mackinac Island, had already indicated that this elevation and this slope are both alike characteristic of the highest Algonquin beach line near this isobase. Our own measuremeuts both to the east and west confirm the earlier determination, as will be shown below, and we may, therefore, conchide that these deposits are not merely a kame terrace as supposed by Russell. In addition, the deposits are of the nature of a delta formed in an early stage of Lake Algonquin when the margin of the ice was close at hand in an east-northeast west-southwest direction near Brampton (Fig. 39), and extended a tongue down into the Little Bay de Noc. The levels derived from surveys in connection with the Peninsular Division of the C. & N. W. Railway between Bay Siding and Brampton show how nearly the surface of the deposits approaches a horizontal plane...show more

Product details

  • Paperback | 28 pages
  • 189 x 246 x 2mm | 68g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236969006
  • 9781236969002