The physical geography of New York state . blished, while others may lie c_-. 224 The Physical Geography of New York State upon a certain familiarity with the region, a careful and ex-tended reading of the more important papers, and a candidconsideration of the facts obtained from these two HISTORY.—It is evident that before theglacial period, the country included in the St. Lawrenceriver system, together with other parts of northeasternNorth America, had for a long time been subjected todenudation. No modern geologist questions this, and the. FIG. 121. Newberrys ideal resto
The physical geography of New York state . blished, while others may lie c_-. 224 The Physical Geography of New York State upon a certain familiarity with the region, a careful and ex-tended reading of the more important papers, and a candidconsideration of the facts obtained from these two HISTORY.—It is evident that before theglacial period, the country included in the St. Lawrenceriver system, together with other parts of northeasternNorth America, had for a long time been subjected todenudation. No modern geologist questions this, and the. FIG. 121. Newberrys ideal restoration of the New York region in preglacial times. evidence of it may be found on every hand. The result ofthis exposure to denudation was the transformation of theland into a series of hills and valleys, occupied and drainedby rivers. Our general land topography has been pro-duced by this long denudation, and no one questions thatat least a part of the form and topography of the valleysof the Great Lakes has resulted from its Another fact upon which there is probably no differenceof opinion, is that, in the period before the general glacia-tion, the land stood at a higher level than now and that it 1 Agassiz (Proc. Amer. Assoc. Adv. Sci., I., 1849, 79; Lake Superior, Boston,1850, 417-426) points out that the detailed outline of part of the shore of Lake Supe-rior is due to the presence of dikes, indicating that denudation has been influencedby them. Origin of fit* I>nsins of flu (!r<nt /,<//,<.s •_!_.) stood at such a level for a
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