52 NEW YORK STATE MUSEUM 



deposits over which they flow. In several places, as at Wood 

 Falls, the rivers have become fixed in rock gorges ; in other places, 

 where recent shifting has caused them to cut deeply into the 

 banks, the streams are on or near the bed rock and are soon likely 

 to become fixed in their course. The bank at the sharp bend 

 between Thorn and Mooers Forks on the Big Chazy is being 

 undercut on the north side, but the stream is here partly on bed 

 rock. 



Bovington brook, near West Chazy, presents a good example of 

 a small stream which has been extended as the land rose above 

 the old water levels with their beach barriers. At about 450 feet 

 the stream passes by a small cut through a barrier beach thrown 

 across its path. Corbeau brook, where it traverses the beaches on 

 the 400 foot contour line, has swept these deposits away for several 

 yards south of its present channel. 



Wind-bloton sands 



Wind-blown deposits of sand in the form of ancient dunes of 

 small extent occur south of the Big Chazy river in the southeast- 

 ern corner of the town of Mooers at an elevation between 240 feet 

 and 260 feet above sea level. They appear to have accumulated 

 from the deflation of the surrounding sandy tracts. Two such 

 areas of blown sand are shown on the map. That on the bound- 

 ary line between the towns of Mooers and Champlain is the more 

 conspicuous dune; it has been resorted to as a source of fine sand. 

 Except for the blowing of sand about the artificial openings in 

 the soil covering of the deposit, the sand appears not now to be 

 blowing, and it does not seem likely, with the generally thick grass 

 coating of this region, that these deposits will prove detrimental 

 to farm lands by their extension. 



Dunes have not been recognized in association with the ancient 

 shore lines at higher levels within the area, nor are ancient or ex- 

 isting dunes observable about the sandy deltas along the Chazy 

 river and its branches. 



Swamps 



The fresh-water vegetal accumulations within the area are ex- 

 tensive, particularly in the low grounds and as narrow strips be- 

 tween and behind the low gravel and shingle ridges in the zone 



