File:Annual report (1912) (18425504952).jpg

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Title: Annual report
Identifier: annualreport6611912newy (find matches)
Year: 1902 (1900s)
Authors: New York State Museum
Subjects: New York State Museum; Science; Science
Publisher: Albany : University of the State of New York
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Biodiversity Heritage Library

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THE GEOLOGICAL HISTORY OF NEW YORK STATE 83 It is practically certain that preglacial streams were here north- flowing rather than south-flowing, because during long Tertiary time such tributaries to the large stream in the Ontario basin must have developed across the steep north slopes of the Niagara and Helderberg escarpments, and also because the slope of the Genesee uAORE/V/r/
Text Appearing After Image:
Fig. 27 Grabau's interpretation of late Tertiary drainage in the eastern Great Lakes region, the intention being to show the general kind of drainage rather than the exact location of the streams. The " Rome" river with source at Little Falls is well shown. The three south-flowing streams should, in the writer's opinion, be represented as north-flowing, at least immediately prior to the great Ice Age. After Grabau, N. Y. State M s. B.l. 45, fig. 6 river is now, at least, so decidedly downward toward the north. If the late Tertiary Genesee flowed southward, the reversal of its course must have been caused by a very marked tilting of the land, but we have no evidence for such a decided land movement. In our discussion of Mesozoic drainage (see chapter 5) we found that, during the early part of that era, nearly all the drainage of

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Volume 1912
Flickr tags
  • bookid:annualreport6611912newy
  • bookyear:1902
  • bookdecade:1900
  • bookcentury:1900
  • bookauthor:New_York_State_Museum
  • booksubject:New_York_State_Museum
  • booksubject:Science
  • bookpublisher:Albany_University_of_the_State_of_New_York
  • bookcontributor:Smithsonian_Libraries
  • booksponsor:Biodiversity_Heritage_Library
  • bookleafnumber:503
  • bookcollection:biodiversity
  • BHL Collection
  • BHL Consortium
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