SMITHSONIAN MISCELLANEOUS COLLECTIONS 



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Cambrian ■ - 



Unconformdlile c.mt i t lictween the Cambrian (7' = Tapeats sandstone) and the tines; exprsure of ■) 

 exposed between the \ich(_an as seen m plate 42 and the highest beds of the Algonkian shown on the ni 

 beneath the clitts of Lanil)rian (/=lapeats) sandstone as the outcrop of the latter winds m and out aroi 

 the Chuar series (C/i) aie beautitulh exposed on the west side of the Grand Canyon in the Canyon \ alle> 



gressing Midi 

 The line 

 The local 



,..„ seas covered them with its beach sands^ 



t(irmit> (.^() at the base of the Cambrian (r=Tapeats sandstone) cuts across th.i 



the north and west sides of the Grand Canyon of the Colorado River, Arizona, op[ 



