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THE JOURNAL OF GEOLOGY. 



ing a broad, low ridge between them. But the glacier is suffi- 

 ciently massive to embrace them both, and bridge over the 

 intervening divide. The effect of the ridge, however, is a slight 

 incurving of the frontal margin of the glacier in passing over it, 

 and the development of two imperfect terminal lobes, one occu- 

 pying each valley. 



,.,. .. 



Fig. 7. — Nearer view of a portion of the extremity of the Lower Blase Dale 

 glacier shown in Fig. 6, illustrating the superposition of the ice upon its morainic 

 material. 



At the time of our first visit, on the 16th of July, the edge 

 of the ice and the terminal moraine on this divide were not only 

 concealed by snow, but so deeply buried that the limit of the 

 ice and even the existence of the terminal moraine could only 

 be inferred from adjacent exposed portions. On reaching the 

 crest of the glacier, we found that the larger part of its surface 

 also was still buried in snow. In places it even then retained a 

 depth of three feet or more, which greatly impeded progress, 



