l82 NEW YORK STATE MUSEUM 



At the foot of this hill to the north the Spring brook has cut down 

 to bedrock, which here is Potsdam sandstone. 



In the central part of the embayment is a wide, level plain of 

 sandy loam whose top is crossed by the 340-360 foot contour lines. 

 It stretches along the side of the Brevoort Brook valley. A fill of 

 the old Crown Point Iron Company's railroad bed crosses this 

 valley and continues westward along the south side of the sandy 

 deposit whose top is at 360 feet altitude (on the contour map). 



The drop of the waters to the Fort Edward level left Sugar hill 

 a promontory in front of Breed hill. Its eastern and northeastern 

 faces are precipitous, and the bare rock exposed there must have 

 risen from the water as wave-lapped cliffs. The northern face of 

 the hill felt the bite of the waves sweeping down the length of the 

 whole valley when the ice had retreated far to the north. The 

 evidences are strongly marked here, and extend over a great vertical 

 distance. Above the limit of the waves rise clay knolls, and again, 

 below the limit of their action, the uninterrupted slope of till con- 

 tinues downward to the marine level. 



The face of Sugar hill east of the highway is marked by gneissic 

 ledges washed bare on top, with low cliffs at their bases (plate 4, 

 lower figure). Scattered over this slope are boulders of all sizes. 

 In the lee of an outlying reef or island is a sandy shoal deposit. To 

 the west of the road behind Colonel Barker's house (357 feet alti- 

 tude), is a stony beach (plate 5, upper figure). This rocky beach 

 line curves around the southwest side of the hill, and here in the 

 more sheltered situation it merges into a gentle line of light loam 

 devoid of exposed, wave-washed stones. It skirts the bases of clay 

 knolls. 



On the eastern face of Breed hill are ravines situated so that their 

 north walls would have afforded a slight protection from the north 

 winds and currents , in the glacial lake. These ravines would thus 

 have formed tiny coves at the lake level in which sandy deposits 

 could form. Such deposits, more or less obscure, can be found here, 

 and correspond with the various lake levels. In two of these ravines 

 aneroid readings on such deposits gave an altitude of 347 feet. On 

 the southeast face of Dibble mountain is a sloping terrace at 362 

 feet (A. T.) that corresponds in altitude with this stand of the 

 waters. 



Nearby, on Sawyer hill, is another beach terrace. The aneroid 

 here read 332 feet. This splendidly developed terrace is in every 

 way similar to the one described on page 16. It lies 100 feet below 

 that terrace and parallels it throughout its whole length. The north 



