470 



GEOLOGY 



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Fig. 357. Map showing the outcrops (in black) of Lower Mini Middle C.-MM- 

 brian formations. The areas shaded by lines represent regions \\hciv 

 the formations are believed to exist, though not exposed. Tin- longer 

 the lines, the better the basis for belief in the existence of the 



(Continued ,-it l)ottoni of page 471.) 



