ANCIENT WATER LEVELS OF CHAMPLAIN-HUDSON VALLEYS 139 



son from the base of the Adirondacks to Fort Edward and by 

 the older channel of Wood creek. It will be convenient to treat 

 of the glacial features of this district in what appears to be 

 the order of their sequence in time which as everywhere in the 

 Hudson valley is quite uniformly in a descending order as re- 

 gards the vertical distribution of the deposits. These deposits 

 consist of high level terraces with invariably an ice contact face 

 confronting the Fort Edward district, and a lower series of 

 deposits made in open water; while at still lower levels there is 

 the evidence of erosion by running water as in the gorge farther 

 south. 



Of the glacial terraces, the highest and oldest as well, lies within 



the Adirondack canyon of the Hudson. This deposit rises to the 



w 



LUZERNE MT 



Fig. 18 Terraces in the vicinity of Palmertown mountain. On left hand is shown the 

 Hartman terrace in the Hudson canyon. 1, 2, 3, 4, represent successive positions of retreat- 

 ing ice margin. At 4, is the Isame terrace at eastern base of the mountain overlooking 

 the Fort Edward district. 



hight of 680 feet above the sea or about 400 feet above the bed 

 of the river at its base. The small hamlet of Hartman post- 

 office is located on its top. The river has cut away the eastern 

 front of the deposit giving a partial exposure of coarse gravels 

 about 200 feet thick at base, over which come stratified clays 

 and sands, above which in turn occur gravels with a rude kame 

 topography, the whole showing a time of torrential currents in 

 the canyon followed by lacustrine conditions with the deposi- 

 tion of clay in the gorge to a hight fully 500 feet above the 

 present sea level; then a return of the ice in the coarse glacial 

 detritus which caps the clays. The entire iseries is evidently 

 earlier than the deposits which occur outside of the mountainous 

 belt over the Fort Edward district and therefore need not be 

 taken further into account in an attempt to fix the water levels 

 which followed the disappearance of the ice from this region. 



The glacial terraces which flank the mountain bases around 

 Fort Edward are typically represented in that of Palmertown 



