144 NEW YORK STATE MUSEUM 



Further indications of tlie overriding action of ice are found 

 south of Fort Edward quite within the gorge of the Hudson 

 at {Summit station on the electric railway line. The annexed 

 figure is intended to show the nature of the disturbec^ clays as 

 seen shortly after the excavatious for the line Avere made [Ug. IIJ]. 



{Similar disturbances in the drift deposit were described by 

 Fitch as being visible when tlie Dehiware & Hudson Kailroad 

 cuts were made south of Fort Edward. All the evidence points 

 to the conclusion that after the deposition of clays over the 

 Fort Edward district at a time when the ice front had retreated 

 an unknown distance to the north, there was an advance of the 

 ice probably as far south as the mouth of the Moses kill within 

 ^he Hudson gorge. 



Deposits in Argyle and Hartford. On the east of the Fort 

 Edward district, the morainal terraces at North Argyle and 

 Evausville have already been described. Below these in the val- 

 ley of the Moses kill in the region of the swamp north of Evaus- 

 ville are bordering kames and gravel deposits also laid down 

 in the presence of ice. 



Clays begin to appear in the upper reaches of small valleys 

 at about 320 feet, as in the branches of Big creek southwest of 

 South Hartford. Below this level the clays cover wide tracts, 

 particularly from 300 feet downward to the margin of the Wood 

 creek channel. These clays are everywhere incised by the 

 numerous small streams of the region. 



(Jlens Falls delta of the Hudson. The ice dam ac*ross the mouth 

 of the gorge of the Hudson at the base of Palmertown mountain 

 has already been described in its effect on the course of that 

 river and in its bearing on the glacial terraces of that region. 

 When the ice finally melted away from the low grounds about 

 Fort Edward normal river and lacustrine deposits began to 

 make. Tlie gravelly and sandy delta of the Hudson spreading 

 from the base of the glacial terraces at the mouth of the Adiron- 

 dack canyon outward to Sandy Hill and Fort Edward was un- 

 traiiiincled in its development by confining masses of ice unless it 

 he oil iIk' iioilli side of the Hudson in the region about the city of 

 Glens Falls, This delta is approximately 350 feet in elevation, ris- 

 ing to 3G0 feet according to tlie ma]) at the base of tlie 400 foot or 



