666 H. L. ALLING GLACIAL LAKES OF CENTRAL ADIRONDACK^ 



1,025, 1,060. The latter is a very strong beach. Assuming 3 feet of 

 deformation per mile, calculation brings the 1,060-foot beach in line with 

 the others. This, according to our present knowledge, would rank the 

 lake as one of the longest of the glacial lakes in the Adirondacks. 



Split Rock Lake (altitude, 770 feet).— In the vicinity of Split Eock 

 Falls, on the Bouquet Eiver, terraces and wave-cut moraines give evidence 

 of a glacial lake at 770 feet. A mile or so to the north, near the junction 

 of Beaver Meadow Brook, similar phenomena arc splendidly developed. 

 Little else has been observed as l<> the general character of this lake (see 

 plate 22, figure 2). 



Elizabethtoivn Lake (altitude, 660 feet). — Dr. Heinrich Eies was the 

 first to describe the almost diagrammatic terraces and lake bottoms at 

 Elizabethtown. 20 He believed that the lake that left these remains ex- 

 isted by virtue of a morainal dam at the head of the Bouquet Valley. 

 lie says in pail : 



"Three and a half miles south of Elizabethtown is New Russia, and one and 

 a half miles south of this town the valley broadens and continues so until 

 north of Elizabethtown, where it narrows suddenly, the river flowing north- 

 ward between Ravens Peak and Woods Hill. It is at this point that the dam 

 of drift probably was which caused the lake, but on account of the steep sides 

 of the valley little or none remains. The outlet of the lake must have been 

 through this valley. 



"The present bottom of the valley between Elizabethtown and New Russia is 

 from one-half to a mile across, so that the lake must have been at least this 

 wide, while its depth in places was 100 feet or even more, as the level of the 

 valley is 540 feet, while the shoreline is 660." 



The writer has found some excellent beaches a quarter of a mile north 

 of Lewis at 660 and 661 feet, and a storm beach at 675. Whether these 

 beaches prove that the Elizabethtown Lake extended farther north than 

 Doctor Eies thought is a question. At the same time the crescent-shaped 

 moraine south of Lewis, already referred to, might have been a clam ; not 

 the one, however, mentioned by Doctor Eies, for the writer can not regard 

 the Eavens Peak- Woods Hill moraine as an important factor. Neverthe- 

 less the beaches line up well. Moreover, the stretch of open sandy plains 

 north of Mount Discovery is at the proper height to be considered part 

 of the Elizabethtown Lake bed. If the "Lewis" moraine was the dam 

 that caused the lake previously described, there existed a true glacial lake 

 north of it at the same height, which is rather improbable. Hence the 

 writer is inclined to consider that the Elizabethtown Lake was not a 



20 Heinrich Ries : Pleistocene lake bottom at Elizabethtown, New York. Acad. Sci., 

 vol. 13, 1893, p. 109. 



