40 NEW YORK STATE MUSEUM 



Salem and East Greenwich, but the bulk of its finer burden was 

 swept into the estuary and forms the extensive plains stretching 

 for 7 miles along the east side of the Hudson. 



Fish creek did not come into existence until the Saratoga dis- 

 trict was lifted out of the static waters. With its small volume 

 it made no delta of consequence. 



As in the Schenectady-Cohoes section of the valley, the sand 

 and silt plains show elegant terracing by the subsiding waters, 

 at all levels from the summit down to 200 feet. The supposed 

 river channels at Quaker Springs and Coveville are only the effect 

 of wave work on the shales and delta stuff. 



In the northwest corner of the Schuylerville sheet and west of 

 Fortsville are sand plains at 426 feet, which are the delta built 

 in the open estuary by the glacial outflow of the Hudson, past the 

 east face of Palmertown mountain. 



Further details and a map for this and the Glens Falls area will 

 be found in paper no. 93. 



Glens Falls and Fort Ann quadrangles. With this area we take 

 leave of the Hudson river and valley proper, and have the col or 

 divide between the Hudson and Champlain sections of the great 

 valley. 



The divide is a wave-smoothed stretch a mile wide and about 4 

 miles northeast of Fort Edward, v/ith altitude about 150 feet. It 

 never carried any river flow. The depth of the estuary over this 

 divide was about 300 feet. From the time when the yielding ice 

 front allowed the sea-level waters to pass beyond the divide into 

 the Champlain section, the waters became the Hudson-Champlain 

 estuary. 



While the ice sheet lay against the Lfuzerne-Palmertown moun- 

 tain face, southwest of Glens Falls, the upper Hudson and eastern 

 Adirondack drainage was forced south at Corinth, through the 

 Kayaderosseras valley, as described above. During the later phase 

 of this flow the waters in the valley of Lake George were forced 

 over into the upper Hudson by a pass 6 miles northeast of Luzerne, 

 at an elevation of 760 feet (see Luzerne sheet). The delta from 

 the George overflow is found north of Luzerne, the broad sand 

 plain being 660 to 680 feet. Ten miles south, at South Corinth, 

 is the outlet of the Luzerne lake, fed by the upper Hudson and 

 the Sacandaga rivers, with altitude 630 to 640 feet (76). 



When the ice front weakened on the steep face of Palmertown 

 mountain the Lake Luzerne found lower escape into the estuary 

 through the mountain pass where the Hudson now emerges from 



