ANCIENT WATER LEVELS OF C1IA M PLAIN— II UDSON VALLEYS 151 



lie only a few feet above the tilted level of the lake in which the 

 Granville delta was made, and appear to be correlated fairly 

 with the Coveville stage. 



At Carver Falls, a terrace exists at practically the same level, 

 but the reconnaissance of the district has not sufficed to deter- 

 mine any definite relation which this deposit bore to the retreat 

 ing ice or to the lake which stages once existed over the lower 

 ground in the region about Whitehall. It is to be observed that 

 at Dresden Center on the west side of Lake Champlain and 

 nearly due west from Carver Falls clays occur from the lake 

 shore up to about the 380 foot line. 



Partial summary. Within a radius of about 5 miles on the 

 east, north and west of Glens Falls, there are deposits made in 

 the presence of lingering ice. These deposits form terraces of 

 varying width, with their summit planes at altitudes varying 

 from about 440 to over 500 feet in elevation. These terraces 

 appear to have risen above the level of the clay-depositing 

 waters which later covered the lower roughened plain of the 

 Fort Edward district. 



The low rounded clayey hills along the line of Wood creek 

 between Fort Edward and Fort Ann are composed of glacial 

 clays evidently overrun by an advance of the ice and strewn with 

 small boulders. Following this there is evidence of the exten- 

 sion of the Hudson delta at the 350 foot level spreading sands 

 as far east as Sandy Hill at lower levels beneath the water sur- 

 face. Clays made over the higher ground on the east in Argyle 

 nearly to the level of the delta. Still later there are evidences 

 of powerful currents passing southward through the district 

 into the gorge of the Hudson. In a later chapter it is thought 

 the explanation of these phenomena is found in the series of out- 

 lets for a glacial lake which extended from the southern border 

 of the Fort Edward district northward through the mountain 

 passes into and over the Champlain valley to the ice front 

 stretching between the Green mountains and the Adirondacks. 



