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NEW YORK STATE MUSEUM 



traced, the evidence on the east of the valley in the form of 

 lateral moraine terraces shows that a long: tongue of ice lay 



Fi«:. 17 Sketch ina|i (lesiKiXMl to show luamior in wliich the jilacior rctrcatecl in the 

 Hiulsoii valley. A, ice front at 'rai)itan N. V.; li, protrusion of fi lacier throujih the HiRli- 

 lani|< III CiKton point: (\a later stajre in the same; I), same sta^c as (' when the ice still 

 tilled mncli of the low lam! noith ami west ol the Highlands; K. the Newl)Ui->f sta^^e. The 

 western limits of the ice at t la; Newl>nrK staye are conjectural. Deliiiite margins of th(; 

 ice on tht-Ciistern side are shown hv ice contacts at K, F, V. Vortical ruling' ii» areas over 

 KKX) ft in elevation 



over the .i;()i';;(' and for sonic miles east of the present river hold- 

 iui^ iij) I lie drainn«!:c of I he side streams for a time, giving a 

 more or less dclinite bell of deposits traceable northward as 



