780 THE JOURNAL OF GEOLOGY. 



was taken on the outer slope of the terminal moraine. A few 

 rods from this point an exposed surface of the underlying rock 

 exhibited characteristic grooving and polishing [Fig. 10]. 



The waters produced by the melting of the edge of the 

 glacier flow over the terminal moraine in little streamlets at 

 various points along its course. To some slight extent, the waters 

 gather between the edge of the ice and the inner side of the 

 moraine, and run for short distances parallel to the ice edge until 

 they find a lower point in the moraine, when they pass across it. 

 As they descend the outer slope, they separate some of the smaller 



Fig. io. Striated surface just outside of the terminal moraine. 



fragments from the mass and slightly round them, producing 

 incipient gravel, but, owing to the rockiness of the morainic 

 material and the shortness of the outer slope of the moraine, this 

 work is very trivial. It however, represents a work that attained 

 very great importance on the outer side of some of our ancient 

 moraines. 



The formation of the moraine is in itself a demonstration of 

 the movement of the ice, but it gave no indication of vigor of 

 movement. No opportunity was offered for instrumental meas- 

 urement, but the natural signs of movement were sought with 

 little result. At the time of our first visit, as already remarked, 

 an immense snow drift covered the border of the ice, the moraine, 

 and a portion of the rock surface outside, yet I saw no signs of 



