File:The physical geography of New York state (1902) (14778865542).jpg

Identifier: physicalgeograph00tarr (find matches)
Title: The physical geography of New York state
Year: 1902 (1900s)
Authors: Tarr, Ralph S. (Ralph Stockman), 1864-1912 Turner, E. T. (Ebenezer Tousey)
Subjects: Physical geography -- New York (State) Glacial epoch Great Lakes (North America) New York (State) -- Climate New York (State) -- Description and travel
Publisher: New York : The Macmillan company London, Macmillan & co., ltd.
Contributing Library: New York Public Library
Digitizing Sponsor: MSN

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FIG. 137. Taylors map showing that stage in the lake history whenLake Algonquin emptied into Lake Iroquois through the Trent(see also Fig. 129). Warren. At one time it included a sheet of water parallelto the southern Erie shore, and probably also the watersthat occupied the Finger Lakes region immediately afterthe abandonment of the Seneca divide, which had con-trolled the level of Glacial Lake Newberry. The eastern-most extension of Lake Warren is not definitely known,and the connection with the Finger Lakes is merely aprobability, based upon a knowledge of the fact that thewaters of Lake Warren did extend eastward until theyfinally found an outflow through the Mohawk. With the uncovering of the Mohawk, the Lake Warrenwaters flowed eastward, and the level fell, until, finally,
Text Appearing After Image:
(261) 262 The Physical Geography of New York State the entire Erie basin was uncovered. Niagara River thenbegan to flow when the water level in the Ontario basinfell below that of Lake Erie. The outflow of the upperGreat Lakes was then, as now, through the Detroit-LakeSt. Glair channel into Lake Erie; and the Niagara Riverwas then, as now, a large river. The three upper lakeswere at that time united to form Lake Algonquin (Fig. 137);but, as the ice front withdrew still further, it uncoveredthe Trent River Valley, which, because of the northwarddepression of the land at that time, was then lower thanthe Detroit channel, so that the waters of Lake Algonquinwere then withdrawn from the Lake Erie overflow, and thesize of Niagara was greatly reduced thereby. The watersfrom the upper Great Lakes then flowed directly into theexpanded Ontario without first passing through Erie. Theexpanded Ontario has been called Glacial Lake Iroquois(Figs. 128 and 137), and its overflow was through the Mo-ha

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