GLACIAL STUDIES LY GREENLAND 



235 



angles, in one instance 70°. These dipping planes were some- 

 tintes marked by debris (though more commonly not) showing 

 that they were genuine planes of acquired stratification. But 

 the distortion often went far beyond mere changes of dip, how- 



FiG. 67. Upthrusted and contorted ice layers on the east side of Bowdoin glacier 

 just north of the East Branch hill. Lines of shearing, sharp flexures, localized belts 

 of contortion and thrust, are among the notable features. 



ever great or abrupt. It amounted to crumpling and even to 

 faulting. A special instance is illustrated in Fig. 67. 



The debris does not rise so high in the Bowdoin glacier as in 

 some of the others already described. This fact is perhaps 

 worthy of special note as this is a tongue of the great ice cap 

 and has descended over an undulatory bottom nearly to the sea 

 level. It is perhaps further worthy of note because this glacier 

 discharges into the sea. The basal layers are not forced 



