NEW YORK STATE MUSEUM 



The inference to be drawn from these facts is plain. A flood of 

 waters once swept northward through Ballston channel, dividing in 

 the vicinity 'jof East Line into three currents which pursued the sev- 

 eral courses described above. The time in glacial history when this 

 took place was subsequent to the general disappearance of the ice 

 and also subsequent to the stage of maximum development of 

 Lake Albany. For these currents eroded out the Lake Albany de- 

 posits that filled at least the southern end of the Ballston channel 

 and the deposits that filled the Round lake basin and then cut into 

 the underlying till and, in places, through the till to bedrock. 



Fig. 4 Sketch map showing the distribution of land and water on the area of the Schenectady 

 quadrangle when Lake Albany was at its height. Shaded part denotes waters of Lake Albany 



