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CLARENCE N. FENNER 



to several inches, and show remarkable continuity and parallelism. 

 The relations shown at this point, however, are by no means 

 universal. It is found frequently that the lighter bands swell and 

 pinch in an irregular manner and that the darker bands are inter- 

 rupted or fade out in places and may be continued after an interval. 

 By a further development of such features and by an increasing 

 predominance of the light-colored bands, we arrive at such results 



Fig. 3 



as are shown in Figs. 2 and 3. These views show another portion 

 of the glaciated surface at the same locality as Fig. i and represent 

 dark bands separated by the light-colored granitic rock and bordered 

 on both sides by large masses of granite. These two photographs 

 illustrate very well the persistence and continuity sometimes shown 

 by the bands of basic rock through masses of granite, and also the 

 manner in which they may suddenly lose their identity and fade 

 out within a few feet or inches. Fig. 4 is a sketch of the details at 

 the termination of one of the bands of Fig. 3. Fig. 5 shows some- 

 what similar features. 



