REPORT OF THE DIRECTOR I915 167 



of glacial lakes ; that the impounded waters following the retreating 

 ice front formed a long inlet from New York bay. "As the ice 

 front melted back the ocean followed it and flooded the valley. The 

 waters were at first the Hudson inlet ; later, the Hudson-Champlain 

 inlet; and finally, the Hudson-Champlain strait (Fairchild, 1913)." '^ 

 The studies of the present writer were based chiefly on the work 

 of Professor Woodworth (1905). His correlated lines of ancient 

 levels (as given on his diagram, plate 28 of reference cited) were 

 accepted as a working basis and the phenomena about Crown Point 

 were found to accord with them. No evidence has been noticed, 

 however, either in support or disproof of the marine origin of the 

 ancient shore lines in this vicinity. 



3 SPECIAL CORRELATIONS OF THIS PAPER 

 AS TO LOCALITY 



The topography of Crown Point, N. Y., and its location in rela- 

 tion to Lake Champlain are shown on the map of the Ticonderoga 

 quadrangle of the United States Geological Survey. 



The locality dealt with in this paper forms an embayment of the 

 main Champlain valley extending inward in a southwesterly direc- 

 tion about four miles, and with a width of two to three miles, 

 roughly speaking. To the north lies the bulk of Bulwagga moun- 

 tain which presents its steep southern flank to the main valley, and a 

 precipitous southern face to the embayment. Its western limits are 

 the slopes of certain hills and Buck mountain, while its southern 

 boundary is the slope of Breed hill with its lower shoulder, Sugar 

 hill. 



The writer continued his observations around the eastern face of 

 Breed hill and Dibble mountain, and southward from the embay- 

 ment through the pass between Buck and Dibble mountains to 

 include the Sawyer hill moraine terrace in the Ticonderoga region. 



AS TO EVIDENCE 



This locality has strongly marked evidence of vigorous glaciation 

 and subsequent modification by action of static waters. All about 

 the bases of these mountains lie great moraines of rubble, and just 

 south of the Vineyard pass is a massive lateral kame terrace of 

 gravel built up by the marginal torrent that debouched through the 

 pass (Peet, 1904, p. 463, 622, 623, and Woodworth, 1905, p. 154- 

 156, 195)- 



1 Loc. cit. 



