I 



68 NEW YORK STATE MUSEUM 



entered the lake. Except near the lower bridge, the river has no- 

 where cut through this old lake deposit to the underlying rock. 



Whitehouse lake. This large lake occupied the valley of the 

 West Branch of the Sacandaga river from 2 miles west of White- 

 house to near the mouth of Jimmy creek. Its length was about 

 5^ miles with general width of from one-half to i mile. A num- 

 ber of fine boulder-free sandflats or delta terraces at concordant 

 altitudes proves the former existence of this body of water whose 

 surface corresponded to an altitude a little above the present 1380 

 foot line. 



Along the trail three-fourths of a mile, and also i^ miles, north- 

 west of Whitehouse are excellent sand flats at an altitude of 1380 

 feet, the first named only being shown on the contour map. Along 

 the road for over 3 miles eastward from \Miitehouse much lake 

 deposit material may be seen, the two best terraces being respec- 

 tively one-half of a mile north of the mouth of Xinemile creek 

 and I mile west of the mouth of Jimmy creek. At the first men- 

 tioned locality, the sand flat lies at 1380 feet with a low knob of 

 boulder morainic material rising above it. The terrace material 

 is stratified and fine gravel as shown in a road cut. At the second 

 named place, a fine big sand flat lies a little below 1380 feet. 



This lake was formed by a blockade of glacial debris or ice across 

 'the river channel in the vicinity of the mouth of Jimmy creek. 

 iSince abundant, heavy, boulder morainic maierial still remains here 

 and also since the only possible outlet of the lake was eastward, the 

 dam was more likely one of drift than of ice. 



Arietta lake. This long narrow lake occupied the valley bottom 

 of the West Branch Sacandaga river from the Shaker Place 

 {Piseco Lake sheet) and eastward past Avery's Place and to the 

 :mouth of Silver lake stream (Lake Pleasant sheet) with a branch 

 ■extending southward from Arietta over the areas of the three Stink 

 lakes (Lassellsville sheet). Excellent sand flats at 1680 feet along 

 the road a mile north of Arietta and from the mouth of North 

 Branch eastward for a mile, show the former water level. 



Hope lake. This long, narrow lake occupied the Sacandaga 

 valley bottom from the mouth of the West Branch Sacandaga 

 river to or near Northville. a distance of 10 or 11 miles. An arm 

 of this lake probably extended up the valley of East Stony creek 

 to near Hope Falls. For a mile just below the mouth of West 

 Branch, the river road lies on a distinct sand flat at 940 feet. Near 

 the mouth of Colombe brook a small, though perfect, delta terrace of 

 gravel and sand hes at about 940 feet. Beginning i^^ miles south 



