New York State Museum bulletin . r by way of Rock riverinstead of westward as at present through Raquette lake and thencenorthward into the St Lawrence (see figure i). Evidence in sup-port of this view is twofold, namely, the rock barrier at the easternend of Utowana lake and the drift dam at the eastern end of BlueMountain lake. Rock ledges are practically continuous across thenarrow channel at the eastern end of Utowana lake, while thechannel connecting Eagle and Blue Mountain lakes is entirely in 54 NEW YORK STATE MUSEUM drift deposits. Thus the movement of water must here have beeneastward
New York State Museum bulletin . r by way of Rock riverinstead of westward as at present through Raquette lake and thencenorthward into the St Lawrence (see figure i). Evidence in sup-port of this view is twofold, namely, the rock barrier at the easternend of Utowana lake and the drift dam at the eastern end of BlueMountain lake. Rock ledges are practically continuous across thenarrow channel at the eastern end of Utowana lake, while thechannel connecting Eagle and Blue Mountain lakes is entirely in 54 NEW YORK STATE MUSEUM drift deposits. Thus the movement of water must here have beeneastward in Preglacial time. Thirty-four marsh on Rock rivercomes to within one-half of a rriile of Blue ^Mountain lake and itis about 20 feet lower than the lake surface, the intervening spacebeing occupied by loose sands and gravels. It would be a simplematter, by shovehng out a trench nowhere over 20 feet deep, tocause Blue ^lountain and Eagle lakes to drain eastward. Yearsago such an attempt was actually made but stopped by law. The. rc^aiiGiiS Oi. LTic courses to Lnosc 01 tnc present. Pre^ show only where essentially different from those of today. The rectangulararea shows the position of the Blue Mountain quadrangle. Preglacial drainage eastward through the lake basins was more inharmony with the course of the upper waters of Rock river whichhas its sources in and around Wilson pond about 3 miles southwestof Blue Motmtain lake village. Utowana-Raquette lake basins. That the Preglacial drainagethrough the Utowana lake basin passed westward into the basin GEOLOGY OF THE BLUE MOUNTAIN QUADRANGLE 55 now occupied by Raquette lake is certain, there being only a driftdam at the western end of Utowana lake. From the Raquette lakebasin the Preglacial drainage was either northeastward by way ofRaquette river as now, or southwestward by way of the valley nowoccupied by the Fulton Chain lakes. Although this problem hasnot been carefully studi
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Keywords: ., bookauthorne, bookcentury1900, bookdecade1910, booksubjectscience
