Pleistocene Geology of Moravia Quadrangle 
385 
approximately south-20°-west. The drift ridge which marks the 
latter position is followed by a highway, the second north-south 
road east of Asbury; it is also indicated by the contour line. This 
moraine continues in the general direction already mentioned 
southward leaving the sheet. The sharpest development of the 
ridge is in the valley east of Asbury; nevertheless the line of drift 
may be traced southward up over the rock salient, which has an 
altitude of 1120 feet, thence down the south slope of this hill, 
where the drift becomes more kame-like and blends into the 
accumulations of the Dryden sheet. 
The ice apparently kept this general position for a time after 
the valley tongue had withdrawn from Groton, for this moraine 
I continues, when traced northward, into Cayuga county, blending 
' with valley drift west of loop ‘‘F’’ (p. 358). 
I Would allude again to the fact that this moraine shows clearly 
1 the control exercised by the Cayuga valley lobe on the ice-front 
1 in this part of the Moravia quadrangle. The irregular course 
I of the drift belt is not so perplexing when We consider the topog- 
I raphy of the Genoa sheet in connection with that of the Moravia 
I quadrangle. This is further evidence that the particular form 
1 assumed by the margin of a receding continental glacier reflects 
I the local topography to a much greater extent than the general 
I topography of the area farther northward. 
The eastern segment of the Groton loop continues northward; 
I but the whole region east and northeast of Groton is such a mo- 
rainic complex^^ it is quite impossible to map particular halts 
except where a minor protuberance of the ice has stood across 
one of the upland valleys from which it retreated rapidly, as 
south of Summer Hill, and again west of this place. The greatest 
established depth of this drift is 135 feet, a well record on the 
Summer Hill road at the farm of A. C. Ranny, and this well does 
' not reach rock; directly south of this well, on the next road, rock 
was reached at 85 feet. The last position of the glacier associated 
with the moraine under consideration is indicated by a band of 
drift, in places one-half mile wide, extending to North Summer 
I Hill where a stationary position of the ice-front is indicated by 
, both the heavy hummocky moraine and the drift loop. 
1 Eastward, the ice reached south in crossing the lower area 
about Lake Como; a very distinct terminal moraine was developed 
Tarr: Bull. Geol. Soc. Jm., vol. 16 (1905), p. 223, 
