CLAY AND ITS MODE OF OCCURRENCE. 



17 



If the beds are tilted (Figs. 8 and 9), or folded and the crests 

 of the folds worn off (Fig. 10), then the different beds will 

 outcrop on the surface as parallel bands, whose width of outcrop 

 will decrease, with an increase in the amount of dip (Figs. 8 and 



9). 



Fig. 8. 



Section showing outcropping beds of tilted strata. 



' J 7.i ■ > 



:r«h.> 



■::'hi.'j 



Fig. 9. 



Section of vertical beds. The width of outcrop is the same as the actual width of the bed. 



Fig. 10. 



Section of folded beds, with crest worn away, thus exposing the different layers. 



Erosion. — All land areas are being constantly attacked by the 

 weathering agents (frost, rain, etc.,). The effect of this is to 

 2 CI, G 



