GEOLOGY OF MOUNT MARCY 



69 



The South Meadows lake. The highest definite level recognized 

 by the writer in the Mount Marcy quadrangle is the South Meadows 

 lake, so named from the remnants in the South Meadows country. 

 About one-fourth of the area covered by the lake is situated in the 

 Mount Marcy sheet; the Lake Placid, the Saranac and Santanoni 

 quadrangles coming in for equal shares of the rest. It is believed 

 that the ice consisted of three lobes ; one covered the greater portion 

 of the Saranac quadrangle, the second lobe was fed through the 



Fig. 8. Map showing the preglacial channel of the East branch of the 

 Ausable river south of Keene. Light lines, contours, 100 foot interval ; heavy 

 continuous lines, streams; heavy broken lines, preglacial channel; straight 

 line near top, boundary between Mount Marcy and Lake Placid quadrangles. 

 North is at the right hand side of figure. 



narrow depressions to the east and west of the Whitef ace-Esther- 

 Wilmington massif and covered the territory where Lake Placid now 

 lies; the third and most eastern lobe, here considered, completely 

 filled the valley of the East branch of the Ausable river, including the 

 Keene valley. 



The South Meadows lake was of irregular shape, some 10 miles 

 long and wide, containing a number of islands, among which 

 Mount Jo and Seymour mountain can be mentioned. Its outlet has 

 not, as yet, been definitely established, but a very probable one is 

 offered as follows: It begins at the swamp just south of Alford 

 mountain in the Santanoni quadrangle on the Essex-Franklin county 



