File:The physical geography of New York state (1902) (14592402970).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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ion of tin- postglacialgorges. The depth of the delta-filling in some casesamounts to 200 to 300 feet, and the surface is nearly level,because it is primarily determined by the plane .,f tin-lake surface. These level tracts, reaching slightly abovethe water, are naturally swampy, particularly near tin-lake shore, and the same is true of some ! the Mnall delta-that are being built along the margin of these lakes oppositethe gorges, as, for example, opposite Taugliammck, n tin-shores of Lake Cayuga. These marginal delta swampsare not so extensive in Lake Cayuga as they are ;il«>ng N 210 The Physical Geography of New York State the shores of Chautauqua Lake, because the depth of waterto be filled is much greater in Cayuga than in the shallowChautauqua. Opposite the mouths of all the larger streamsentering Chautauqua Lake there are broad and very swampy delta tracts. The delta plains near the head of Lakes Cayuga andSeneca are most swampy on the side where the sediment
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FIG. 114. Temporarily flooded western portion of Inlet delta at head of Cayuga Lake, New York. supply is least abundant, that is, on the western side inthe case of Cayuga, and on the eastern side in the caseof Seneca. This has had an important influence in deter-mining the location of the two towns of Ithaca and Watkins(Figs. 96 and 114; also, p. 81). Accumulation of rock debris in the lake will in timedo more than form deltas opposite the stream mouths.It will eventually fill up the lake.1 This filling is aidedin its last stages by vegetation. The reeds, the lily pads,the sphagnum moss, and other water-loving plants, trans- 1 Smyth, Amer. Geol., XI, 1893, 85-90. and 211 form the shores to swamps, and finally may reach over tin-entire surface, forming a broad swamp in place of tin-lake (Fig. 119), at first not dry enough for trees, but latertransformed to a tree-covered swamp. In these swampspeat is formed,1 and there are thousands of filled pondsand lakes of this origin in the State.

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