The physical geography of New York state . study will no doubt discover sand-plains in New York (p. 90). 1 There is reason for believing that some of the New England sandplains arereally deltas formed in the sea when the land was somewhat lower than at present, asit was during the close of the Glacial Period. 2 For a discussion of sandplains see Davis, Bull. Geol. Soc. Amer., I, 1890,195-202; Davis, Proc. Boston Soc. Nat. Hist., XXV, 1892, 477-499; Gulliver, , 1,1893, 803-812; Salisbury, Annual Kept. New Jersey Geol. Survey, 1892,99-102. Influence of tltc (llndul /< ri»<l l^xm
The physical geography of New York state . study will no doubt discover sand-plains in New York (p. 90). 1 There is reason for believing that some of the New England sandplains arereally deltas formed in the sea when the land was somewhat lower than at present, asit was during the close of the Glacial Period. 2 For a discussion of sandplains see Davis, Bull. Geol. Soc. Amer., I, 1890,195-202; Davis, Proc. Boston Soc. Nat. Hist., XXV, 1892, 477-499; Gulliver, , 1,1893, 803-812; Salisbury, Annual Kept. New Jersey Geol. Survey, 1892,99-102. Influence of tltc (llndul /< ri»<l l^xm Tj></rJiy 133 KAMES.— Throughout New York, commonly in associa-tion with the moraines, but often isolated, there are singlehills, or groups of hummocky hills, of stratified drift In topographic form they resemble moraines andare often a part of such deposits; but elsewhere they seemto bear no relation to morainic bands. Single hummocksmay be found upon hillsides and even on hilltops. They. FIG. 68. A group of kame hills with deep kettles in the moraine near Fri-eville,New York. An overwasli plain is seen in the foreground. are well stratified, sometimes confused with the layersdipping in various directions, and exceedingly variable intexture. Moreover, the layers are sometimes broken, show-ing disturbance subsequent to deposit. In different placestheir origin is apparently quite different. Glacial waterhas evidently made them; but there are various ways inwhich this water may construct hills of stratified in caverns under the ice; hills made by cascadeswhich carried much sediment down the ice front or throughcrevasses into the ice; deposits in tiny lakes upon thesurface of the glacier; and the escape of subglacial streamsinto marginal lakes, are some of the more common waysin which kamos may have been made. By such actionhills several scores of feet in height have been constructed. i Salisbury, Annual Kept. New Jersey Geol. Survey, 1891, 9
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