MISCELLANEOUS COLLECTIONS 



s:'^, ^ ■' ." 



an 



W^ 





M 



BA 





Liicontoniuible contact on line (.-Ire) between Archean (/ 

 forms terraced slope, and in turn is overlain by Cambrian Mi 

 Isis " rests on 



Locality: N 



el ^'% 



Carboniferous sandstone. . , , rtritrht Anf ' ,ii 



Jorth side of Grand Canyon of the Colorado River, Arizona, below L;nKi^^.^^ pl,ot"«f'i, 



This photograph and also plates 41. 42, and 43 taken by Norman W. ^arknii . ^ sanils''"''^;,,. 



Lettering on pla'es 40-43. Carboniferous: A' = Kaibab limestone; C — V-o<^°' , -j, -; Unkar " 

 Muav limestone; S.-J = r.right .\ngel shale; 7' = Tapeats sandstone. AlgonHian . 



g^ogi, 



ght 

 unconformity between .Mgonk 



-Vishr 



rmat?on""e^'L.'l!''^'L''0" of VValcott, in 1901. 

 series ^~^f."Qstone of Supai formation; 

 ■^o — line of unconformity betwee 



/?=Kedwall limestone. Ca. 

 Archean and Algonkian. 



'ibrian: M- 

 .-Ji- = line of 



