172 . NEW YORK STATE MUSEUM 



hut if thoy wovo not at tho s(^i level of iho time, foniiod a stage of 

 tlie glncinl lake in Mliicli a discharge was found ])ast tlie nortliern 

 horder of the Green mountains into the lower St Lawrence valley 

 past the edge of the iee sheet. This is a point however which is 

 still under investigation. 



In tho lower margin of this delta at Freydensburg's mills at 

 an elevation of 340 feet marine shells have been fonnd. There are 

 slight to])ographic evidences that this i>ortion of the deposit is 

 separated constructionally from the broad plain at Morrisonville. 

 Certainly this part of the deposit was made in the sea. The 

 calculated hight of the npper marine limit at this locality is 

 375 feet. 



Shore lines of tlie Mooers quadrangle. The shore lines and 

 deltas of this area are more fully described in the special report 

 on that atlas sheet. 



Beginning on the south near West Beekmantown, there are 

 faint traces of wave action up to nearly 640 feet. Occasionally 

 stronger traces with definite beach ridges are found at higher 

 elevations northward till Cobblestone hill, northwest of West 

 Chazy [see pl.22] is reached Avhen remarkably strong wave action 

 is found as high as 675 feet [see station 50, pl.28]. Thence north- 

 ward beach ridges occur along the northern and eastern margin 

 of the Altona flat rock district at a slighth^ increasing elevation 

 toward the north. There is a delta at Altona [see station 51, 

 pl.28] with what appears to be an ice-free margin at 640 feet, and 

 the remnants of another on the north branch of the Big Chazy river 

 at an elevation of at least 660 feet [see station 52, pl.28]. North 

 of Deer jiond there are faint shore traces at about 705 feet. At 

 Cannon Corners on either side of the English river there ai*e hook- 

 like bars curving into the valley mouth between 700 and 720 feet in 

 elevation. Somewhat south of these and on the extreme western 

 border of the area what appear to be w^ave-heaped materials 

 occur as high as 750 feet. In the extreme northwestern corner 

 of the quadrangle at the head of Kellas brook in the region known 

 as Armstrong's Bush there is a cobblestone ridge Avith a recurved 

 hook at lis soulhern end a! an elevation of 720 feet [see station 53, 

 pl.2S] . A short dislam^e west of this last exam])le at the corner of 

 Ihe i-o;h1 lending (o Covev Hill i)ostoni(e and beyond the limits of 



