54 



NEW YORK STATE MUSEUM 



Theoretic lake succession 1 



In conformity with the above theory of the lake and drainage 

 history the succession of the larger glacial lakes would be as follows: 



APPROXIMATE ALTITUDE ON THE 

 LAKES BATAVIA-SYRACUSE PARALLEL 



1 Watkins, (Horseheads outlet, 900 feet) 



2 Newberry (expanded Watkins) iooo± feet 



3 Hall Tooozh down to 900+ feet 



4 Vanuxem 900 ± down to extinction 



5 Episode of free eastward drainage and no lakes 



6 Second Vanuxem rising toward 900+ feet 



7 W r arren 880 feet 



8 Hyper-Iroquois, Lake Dana 700 feet 



9 Hyper-Iroquois, Lake Dawson 480 ± feet 



10 Iroquois 440 feet 



Description of the maps of glacial lake succession 



Plates 34-42 



This series of maps shows in a generalized and theoretical way 

 the supposed succession of glacial waters in the central part of the 

 State and graphically epitomizes the history discussed in the paper. 



The limitations of the ice sheet are more or less hypothetical, 

 specially in their east and west extensions, or beyond the central 

 territory of Batavia-Syracuse. Some attempt has been made to 

 show the lobations of the ice margin due to the larger valleys but 

 not of the minor sinuosities. It is recognized that the ice border 

 was not always a bold or solid front, but in some districts may have 

 been a thinning sheet, melting to stagnant and separated masses 

 about which the glacial waters circulated. 



The glacial waters fall into three groups, as distinguished by the 

 color shading. The succession of ice-dammed waters which were 

 indigenous to central New York, the direct inheritance from Lake 

 Watkins, are given horizontal shading. Those waters which origi- 

 nated in the Erie basin are represented by vertical shading; while 

 those which collected in the Oneida-Rome district are expressed by 

 oblique shading. 



1 A statement and tabulation of the episodes in the glacial lake history as 

 affecting the Cayuga valley was printed in connection with the preliminary 

 announcement of the special summer meeting of the American Association 

 for the Advancement of Science held at Ithaca, N. Y., June 28-July 3, 1906. 



