222 C. D. WxVLCOTT — PRE-CAMBRIAX FOSSILIFEROUS FORMATIONS 







as 



o -S 

 cc c 



^^ 



? S 

 c ~ 



3 OJ 



c c 



c4 







Minnesota and 

 Dakota quartz- 

 ites surround- 

 ed by fossil il- 

 erons series. 











M 1 n n e s t a 

 River Valley 

 gneiss and 

 granite. 



o 



c 



o 



c 

 c 



a; 



£ 

 .o 



to <o 



==-P o-e 



Kb Is 



i 



t2 



1.1=2 



>> 



<2 

 3 

 

 



3 



Fundaiiiental 

 complex. 



(Not yet sepa- 

 rated In map- 

 ping.) 



■a 

 •-§ 





C 

 t4 



g 

 .3 



S 



c 



o o 



■5 

 3 



E 



_S 

 



C 



5 



X 





 E 







1 



c 



5 



Southern complex. 



(Separated in map- 

 jiliig into (iiio 

 grained schist, 

 Marenlscan,an(l 

 g la 11 i t OS and 

 granite- gneiss- 

 es, J.aiirentian 

 showing eliar- 

 acteristie erup- 

 tive contaet.) 



c 



SO 



i 



C 



s 



o 



s 







o 



3 3 



-2S 



tt o 

 O 3 



3 >. 



3 ■'^ 



■- 3 

 



m 3 



3 p 



£=■ 

 



B 

 



s 



>> 



3 



c 



3 



!1 £ S* 

 5-r ^ 3 

 If i'^'^ 



a 



3 

 O 



_o *^ 



o 



fa 











S _3 



3 

 5 



Fundamental 

 eomidex. 



(Not yet sepa- 

 rated in maji- 

 pi'iK.) 



-2 

 o 



3 



cr 

 5 







^6 



s| 



0.3 



S 



3 

 



3 



s 



S: = 



C - 



[Jneonformity. 



Fundamental 

 eoiliplex, 



(Not yet sepa- 

 rated in map- 

 I'ing.) 



- 9 



Is 



o 



c 



cS 

 C 

 0) 



>> 



p 



c 

 o 



V 



a 



.2> 



— S 

 c c. . 



.S C3 



3^ C 



3 ' 



1 

 > 



3 -: 

 So 

 o~ 



S 



3 

 



3 



!>0 



S 

 .2 

 !S 



3 

 

 



c 



3 



?«2 



1 



5 



c o" 



Is 



o 

 "5. 



2 



c 



3 

 O 



H 



3— : 

 =s S 



~ 5 3 



£ £--2^ 



.3 &-W 



3D.2 

 < 



3 

 



3 



t3 



1=1 



^ s 3 3 



«=* 



£ 



a 

 

 c 



3 

 := 



a 



]o 



3 

 

 



§ 



fi 



3 . 



5 





c 

 ei 



c 



o 

 s 

 & ■ 



1 1 



- 3" is 



i:3 1 c 

 ■ s 1 ^ 



2 



3 



= 





 5 



c' 



ci 



a 

 



=; 



—•=2 



C.3 



3" 



a 











3 

 .2 



3 



< 





1 









i 



9 



