U. .s - . GEOLOGICAL SURVEY. 



ANNUAL REPORT 1881. PL. XIII. 



rkanuiii PWeau. 





PanactTeap 



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NilU'li'l. 



\ i-rmilion C'liff.s. 





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rri: ' 





nirz 





rmnir;ini)'i.l\aiiiilil)iM:;.::i 



j£S^EES^pSEx=i 





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S^ 



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SE^p 



3d ii 



■- u i ' r r- k'-i'V-I "q 



e\ tmian. Silurian 8> AivIiumh unconformable Ic (arbonifeiwis 





V: "ilcnal nf Ihirlv 

 mill's inwliiflilln' Mrata 

 ore horizontal. 





MLSilqnm 





Eocene 



m. 



Cretaceous 



. 



S3 . Jura 



Trias 





Per mi mi 



Carbomferoui 



v-;r -T~i Volcanic 



Horizontal and Vertical Scale 



I ■ i t . 1 i_i_. 



tttcoft' 



S.H.B<rffuh. Dtl. 



Section from north to south across the grand canon district. 



