784 



R OLLIN D. SA LI SB UR V 



dition, show conspicuous division. The horizontality of the 

 layers is often interfered with at or near the ends of glaciers, 

 and also at and near their lateral margins. This will be referred 

 to later. 



The vertical arrangement of lavers appears to belong to the 



Fig. 10. — Edge of a glacier on the southeast side of McCormiclv Ba)% showing 

 effect of debris on overhans?. 



category of veining, rather than stratification. The vertical veins 

 appear to be altogether absent in many glaciers, and to be pres- 

 ent in portions only of many others. Their presence or absence 

 did not appear to depend upon an}^ condition which affected the 

 differentiated portion of the glacier. Indeed, if there are signifi- 

 cant differences between the surroundings of glaciers which have 

 vertical-longitudinal veins and those which have not, it was not 

 discovered. The vertical-lonofitudinal veins were not seen in a 



