GEOLOGY 



a steeper descent awaiting him and miles, miles, miles of 

 just this sort of thing then the topographic meaning of the 

 term "Continental Divide" assume its true importance. As 

 has been said before, the crest of the Divide is sinuous, like- 

 wise the trail which follows the crest for a score of miles or 

 more before it takes one headlong plunge to the western 

 slope. 





I 



"A sheer rock wall, along the Continental Divide." 



Weathering has opened up a broad area long the axis of 

 the divide through which the road climbs to the top. After 

 once entering this trough-like depression it is only at inter- 

 vals that a glimpse of the slopes without on either side is 

 obtained and so constant is the rise there is not the least hint 

 of a change until by a sudden turn and within the space of a 

 few rods, the rim of a long fault scarp comes into view down 

 whose tortuous descent the road winds to the western slope 

 of the Divide. 



ON THE WESTERN SLOPE 



As far as the eye can see only low erosion remnants are 

 visible. A gentle dip northwestward and monoclinal shifting 

 down along the softer strata, so dominates the topography, 

 that, unless one observes closely, the shifting might be mis- 

 taken for distributive faulting from which this part of the 

 Divide is exceptionally free. 



