PLEISTOCENE GEOLOGY OF MOOELIS QUADRANGLE 



L3 



320 feet. The latter deposit probably owes its distinctness to its 

 being defended from strong wave action, which elsewhere to the 

 southeasl had Locally greatly modified any such glacial deposits. 

 About 2 miles east of Sciota on the northeast bank of Corbeau 

 creek, Micro is a bell of'morainal topography with deposits com- 

 posed of stony till. It is probable that these deposits mark the 

 position of the retreating ice front along a northwest and south- 

 east line. I have drawn such a line on the accompanying sketch 

 map [pi. 2]. 



Glacial drainage and spillways 

 Of the water action which went on, in and about the glacial 

 sheet in this area, the usual results in the form of kames, eskers 

 and sand plains are inconspicuous. One of the largest and finest 

 eskers in tin 1 Stale, however, occurs on the area of the Rouse 

 Point sheet immediately east, but no definite eskers have been 

 seen on this area. This esker, which is traceable for about 10 

 miles as a more or less distinct ridge, is remarkable as showing 

 how little modification of glacial form may be produced under 

 favoring circumstances by submergence beneath the sea. The 

 bearing of this esker on the late geologic history of the Mooers 

 area is so close that the following notice of the deposit is here 

 inserted. 



Ingraham esker 



This esker appears first to have been recognized by Dr Gilbert, 

 who mention? it in his unpublished notes on this region. The 

 village of Ingraham is strung along the eastern slope of the ridge 

 and suggests the name here given. The accompanying map 

 [pi. 4], with contours drawn by E. C. Barnard of the United 

 States Geological Survey, gives a good idea of the course and 

 position of the esker. 



It is to be noted that its course is southerly in compliance with 

 the direction of ice movement in this part of the Champlain val- 

 ley. The short interruptions through which the several small 

 streams pass are presumably original, low places in the ridge. 

 Thus in the case of the Little Chazy river, it is not probable that 

 the ridge at the point where it is crossed by that stream was 

 originally much higher than it now is, else the stream would have 



