BULL. GEOL. SOC. AM. 



MINNESOTA 



6 

 O 



7a 



/2o' 



70' 

 Z 3' 



20' 

 /J~o' 



/So 



7S 



/oo' 



^r r i , T 1 



s^h: 



^^"^ 



/OQG 



I_0_J 



r~r 



rri 



1 X 



.L I l 



f^^mi 



TTT 



6<.\\e r\ <x 



SV o n c t> HlVe' 

 SavrvV ~Pe\er 



Oneoi 



JorJarv 



S"t la<-VU> V c r\ t e. 



fvantonxft 



WvtxcV^Vcv^ 



"T* VC Ci «Vr*\\» Y \ «\ v\ 



1905. PL. 24 



L.st. 



|X-st. 



st. 



o Lit 



Representing the series of sandstones characters 



(■ 



t 



L? 



ords. 



